MCQ 11 Mark
If the distance between two masses be doubled, then the force between will become:
- ✓
$\frac{1}{4}$times
- B
- C
$\frac{1}{2}$times
- D
AnswerCorrect option: A. $\frac{1}{4}$times
(a) $\frac{1}{4}$times
Explaination : $
F_g=G \frac{m_1 m_2}{r^2}
$
Therefore, $F _{ g } \propto \frac{1}{ r ^2}$
Hence, if the distance between the bodies is doubled, the gravitational force of attraction becomes one-fourth.
View full question & answer→MCQ 21 Mark
The gravitational attraction between the two bodies increases when their masses are:
- A
Reduced and distance is reduced
- ✓
Increased and distance is reduced
- C
Reduced and distance is increased
- D
Increased and distance is increased
AnswerCorrect option: B. Increased and distance is reduced
b. Increased and distance is reduced
View full question & answer→MCQ 31 Mark
A body is brought from the earth to the moon is ___?
- A
- ✓
- C
Mass and weight will change
- D
Both mass and weight will change
View full question & answer→MCQ 41 Mark
A ball weighing $4\ kg$ of density $4000\ kg m^{-3}$ is completely immersed in water of density $103\ kg m^{-3}$. What will be the buoyant force acting on it?
- A
$100\ N$
- ✓
$10\ N$
- C
$1600\ N$
- D
$16\ N$
AnswerCorrect option: B. $10\ N$
$10\ N$
View full question & answer→MCQ 51 Mark
- ✓
Measured by spring balance
- B
- C
- D
AnswerCorrect option: A. Measured by spring balance
(a) Measured by spring balance
View full question & answer→MCQ 61 Mark
What will be the weight of a person on earth, who weights $9N$ on the moon?
- A
$3\ N$
- B
$15\ N$
- C
$45\ N$
- ✓
$54\ N$
AnswerCorrect option: D. $54\ N$
$54\ N$
View full question & answer→MCQ 71 Mark
Archimedes' principle states that the buoyant force applied to an object
- A
Is greater the weight of the fluid the object displaces
- ✓
Is equal to the weight of the fluid the object displaces
- C
Is less than the weight of the fluid the object displaces
- D
AnswerCorrect option: B. Is equal to the weight of the fluid the object displaces
(b) Is equal to the weight of the fluid the object displaces
View full question & answer→MCQ 81 Mark
A metal in which even iron can float is:
MCQ 91 Mark
Mass is a _______ quantity and weight is a _______ quantity:
MCQ 101 Mark
If the gravitational force of earth suddenly disappears, then which of the following is correct:
- ✓
Weight of the body is zero
- B
- C
Both mass and weight become zero
- D
Neither the weight nor the mass is zero
AnswerCorrect option: A. Weight of the body is zero
(a) Weight of the body is zero
View full question & answer→MCQ 111 Mark
The force of gravitation between two bodies does not depend upon:
- A
The separation between them
- B
The gravitational constant
- C
The product of their masses
- ✓
Answer(d) The sum of their masses
View full question & answer→MCQ 121 Mark
The universal Law of Gravitation explained:
- A
The tides due to moon and the sun.
- B
The force that binds us to the earth.
- C
The motion of the planets around the sun.
- ✓
View full question & answer→MCQ 131 Mark
Moon is revolving in a circular orbit with a uniform velocity V0. If the gravitational force suddenly disappears, the moon will
- A
Continue to move in the same orbit
- ✓
Move with a velocity V0 tangentially to the orbit
- C
- D
AnswerCorrect option: B. Move with a velocity V0 tangentially to the orbit
(b) Move with a velocity V0 tangentially to the orbit
View full question & answer→MCQ 141 Mark
In the relation $F = G$ Mm/ do, the quantity $G:$
- A
Depends on the value of g at the place of observation.
- B
Is used only when the earth is one of the two masses.
- C
Is greatest at the surface of the earth.
- ✓
Is universal constant of nature.
AnswerCorrect option: D. Is universal constant of nature.
Is universal constant of nature.
View full question & answer→MCQ 151 Mark
The cause of floating of clouds in atmosphere is:
MCQ 161 Mark
The value of g on moon in $1/ 6 th$ of the value of g on earth. A man can jump $1.5\ m$ high on the earth. He can jump on the moon up to a height of:
- ✓
$9\ m$
- B
$7.5\ m$
- C
$6\ m$
- D
$4.5\ m$
AnswerCorrect option: A. $9\ m$
$9\ m$
View full question & answer→MCQ 171 Mark
When a body is going upwards vertically the acceleration due to gravity is taken as
MCQ 181 Mark
Which of the following physical quantities has no unit:
MCQ 191 Mark
A force of $50\ N$ is applied on a nail of area $0.001$sqcm.Then the thrust on the nail is equal to:
- ✓
$50\ N$
- B
$100\ N$
- C
$0.05\ N$
- D
$10\ N$
AnswerCorrect option: A. $50\ N$
$50\ N$
View full question & answer→MCQ 201 Mark
An apple falls from a tree because of the gravitational attraction between the earth and the apple. If $\mathrm F_1$ is the magnitude of the force exerted by the earth on the apple and $\mathrm F_2$ is the magnitude of the force exerted by the apple on the earth, then:
- A
$\mathrm F_1$ is very much greater than $\mathrm F_2$
- B
$\mathrm F_2$is very much greater than $\mathrm F_1$
- ✓
$\mathrm F_1$and $\mathrm F_2$are equal
- D
$\mathrm F_1$ is only a little greater than $\mathrm F_2$
AnswerCorrect option: C. $\mathrm F_1$and $\mathrm F_2$are equal
$\mathrm F_1$ and $\mathrm F_2$ are equal
View full question & answer→MCQ 211 Mark
Who derived the Universal Law for Gravitation:
MCQ 221 Mark
Consider the following information in respect of four objects $A, B, C$ and $D:$
| Object |
Density (kg/m$^3$) |
Volume (m$^3$) |
Mass (kg) |
| $A$ |
- |
$2$ |
$4000$ |
| $B$ |
$8000$ |
$4$ |
- |
| $C$ |
$2000$ |
- |
$1000$ |
| $D$ |
- |
$4$ |
$2000$ |
Which object would float on water? View full question & answer→MCQ 231 Mark
During a planned manoeuvre in a space flight, a free-floating astronaut $A$ pushes another free floating astronaut $B$, the mass of $A$ being greater than that of $B$. Then, during a push
AnswerCorrect option: B. The acceleration of $A$ is less than that of $B$
The acceleration of $A$ is less than that of $B$
View full question & answer→MCQ 241 Mark
An object can be completely immersed in a liquid when:
- A
The upward and downward forces are balanced.
- B
The downward force is more than the upward force.
- ✓
Both $A$ and $B$
- D
AnswerCorrect option: C. Both $A$ and $B$
Both $A$ and $B$
View full question & answer→MCQ 251 Mark
If the weight of a body is $6\ N$ on the moon, what will it be on the earth:
- A
$6\ N$
- ✓
$36\ N$
- C
$12\ N$
- D
$1\ N$
AnswerCorrect option: B. $36\ N$
$36\ N$
View full question & answer→MCQ 261 Mark
- ✓
Force orthogonal to an area
- B
Force acting along an area
- C
- D
AnswerCorrect option: A. Force orthogonal to an area
(a) Force orthogonal to an area
View full question & answer→MCQ 271 Mark
Why does a mug full of water feel lighter inside water:
- ✓
- B
Because of Gravitational force
- C
Because of an increase in velocity
- D
Because of its kinetic energy
Answer(a) Because of Buoyant force
View full question & answer→MCQ 281 Mark
If a satellite is revolving around a planet of mass $M$ in an elliptical orbit of semi-major axis a, find the orbital speed of the satellite when it is at a distance r from the focus.
- ✓
$\text{v}^2=\text{GM}\Big[\frac{2}{\text{r}}-\frac{1}{\text{a}}\Big]$
- B
$\text{v}^2=\text{GM}\Big[\frac{2}{\text{r}^2}-\frac{1}{\text{a}}\Big]$
- C
$\text{v}^2=\text{GM}\Big[\frac{2}{\text{r}^2}-\frac{1}{\text{a}^2}\Big]$
- D
$\text{v}^2=\text{G}\Big[\frac{2}{\text{r}}-\frac{1}{\text{a}}\Big]$
AnswerCorrect option: A. $\text{v}^2=\text{GM}\Big[\frac{2}{\text{r}}-\frac{1}{\text{a}}\Big]$
(a) $\text{v}^2=\text{GM}\Big[\frac{2}{\text{r}}-\frac{1}{\text{a}}\Big]$
View full question & answer→MCQ 291 Mark
What is the source of centripetal force that a planet requires to revolve around the Sun?
MCQ 301 Mark
Four students $A, B, C$ and $D$ find the acceleration due to gravity at the top of Ooty, Nainital, Mount Everest and Shimla. The acceleration due to gravity is the least:
- A
At Ooty since it is the highest.
- ✓
At Mount Everest as it is the highest.
- C
At Nainital as only latitude has the effect and not height of the peak.
- D
At Shimla as it is the coldest
AnswerCorrect option: B. At Mount Everest as it is the highest.
At Mount Everest as it is the highest.
View full question & answer→MCQ 311 Mark
An object is thrown vertically upwards with a velocity u, the greatest height h to which it will rise before falling back is given by:
AnswerCorrect option: B. $\frac{\mu^2}{2\text{g}}$
(b) $\frac{\mu^2}{2\text{g}}$
View full question & answer→MCQ 321 Mark
What do you mean by Thrust or Buoyant force?
- ✓
The upward force exerted by liquid when a body is immersed in the liquid.
- B
The downward force exerted by liquid when a body is immersed in the liquid.
- C
The upward force exerted by body when a body is immersed in the liquid.
- D
The downward force exerted by body when a body is immersed in the liquid.
AnswerCorrect option: A. The upward force exerted by liquid when a body is immersed in the liquid.
(a) The upward force exerted by liquid when a body is immersed in the liquid.
View full question & answer→MCQ 331 Mark
Which of the following is not true for Universal law of gravitation:
- A
It is the gravitational force between the sun and the earth, which makes the earth move around the sun.
- B
The tides formed in sea are because of gravitational pull exerted by the sun and the moon on the surface of water.
- C
It is the gravitational pull of the earth which keeps us and other bodies firmly on the ground.
- ✓
The gravitational force exerted by sun on earth is larger than that exerted by earth on sun.
AnswerCorrect option: D. The gravitational force exerted by sun on earth is larger than that exerted by earth on sun.
(d) The gravitational force exerted by sun on earth is larger than that exerted by earth on sun.
View full question & answer→MCQ 341 Mark
The value of acceleration due to gravity:
- A
Is same on equator and poles.
- B
- ✓
- D
Increases from pole to equator.
View full question & answer→MCQ 351 Mark
An object weighs $10\ N$ in air. When immersed fully in a liquid, it weighs only $8\ N$. The weight of liquid displaced by the object will be:
- ✓
$2\ N$
- B
$8\ N$
- C
$10\ N$
- D
$12\ N$
AnswerCorrect option: A. $2\ N$
$2\ N$
View full question & answer→MCQ 361 Mark
The relative densities of four liquids $P, Q, R$ and $S$ are $1.26, 1.0, 0.84$ and $13.6$ respectively. An object is floated in all these liquids, one by one. In which liquid the object will float with its maximum volume submerged under the liquid?
View full question & answer→MCQ 371 Mark
Universal gravitational constant is:
MCQ 381 Mark
The atmosphere consisting of a large number of gases is held to the earth by:
MCQ 391 Mark
Buoyant force is directed:
MCQ 401 Mark
Which among the following is a wrong differentiation between mass and weight ?
- A
Mass is amount of matter in a body whereas weight is the measure of force acting on body.
- ✓
Si unit of mass is kg whereas SI unit of weight is newton.
- C
Mass has both magnitude and direction whereas weight has only direction.
- D
Mass can easily be measured by beam balance whereas weight can be measured by spring balance.
AnswerCorrect option: B. Si unit of mass is kg whereas SI unit of weight is newton.
(b) Si unit of mass is kg whereas SI unit of weight is newton.
View full question & answer→MCQ 411 Mark
If the mass of a body is $M$ on the surfrace of the earth, then its mass on the surface of the moon will be:
- A
$\frac{\text{M}}{6}$
- ✓
$M$
- C
$M + 6$
- D
AnswerMass of a body is a constant quantity whereas its weight is a variable quantity. Mass does not depend on the acceleration due to gravity. Hence mass of that body on the surface of moon is also $M.$
View full question & answer→MCQ 421 Mark
When a body is taken from the earth to the moon:
- A
- ✓
- C
Its weight remains unchanged
- D
It becomes completely weightless
View full question & answer→MCQ 431 Mark
The total force exerted by a body perpendicular to a surface is called.
MCQ 441 Mark
An earth-like planet has a radius equal to double the earth's radius. The acceleration due to gravity on its surface will be:
- A
$\text{g}$
- B
$\frac{\text{g}}{2}$
- ✓
$\frac{\text{g}}{4}$
- D
$\text{g}^2$
AnswerCorrect option: C. $\frac{\text{g}}{4}$
(c) $\frac{\text{g}}{4}$
View full question & answer→MCQ 451 Mark
An apple falls from a tree because of gravitational attraction between the earth and apple. If is the magnitude of force exerted by the earth on the apple and $\mathrm{f}_2$ is the magnitude of force exerted by apple on earth, then:
- A
$F,$ is very much greater than $F_2$.
- B
$F_2$ is very much greater than $F,$
- C
$F,$ is only a little greater than $F_2$.
- ✓
$F_1$ and $F_2$ are equal.
AnswerCorrect option: D. $F_1$ and $F_2$ are equal.
$F_1$ and $F_2$ are equal.
View full question & answer→MCQ 461 Mark
What is the relation between thrust and pressure?
- ✓
Pressure directly proportional to thrust
- B
Pressure indirectly proportional to thrust
- C
- D
AnswerCorrect option: A. Pressure directly proportional to thrust
(a) Pressure directly proportional to thrust
View full question & answer→MCQ 471 Mark
The weight of a boy on the surface of the moon is $300\ N$.The weight of this boy on the surface of the earth is:
- A
$300\ N$
- B
$5\ N$
- C
$50\ N$
- ✓
$1800\ N$
AnswerCorrect option: D. $1800\ N$
$1800\ N$
View full question & answer→MCQ 481 Mark
Why does a ship made of steel float on water while an oil-pin of steel sinks down?
- A
Density of sea water is greater and hence the ship floats
- ✓
Owing to the large volume of ship, it displaces more water, so up-thrust is more
- C
The ship contains large air pockets which help it to float smoothly
- D
In case of pin, the pressure is more since the area of its tip is small, so it sinks, but for ship the area of its base is more
AnswerCorrect option: B. Owing to the large volume of ship, it displaces more water, so up-thrust is more
(b) Owing to the large volume of ship, it displaces more water, so up-thrust is more
View full question & answer→MCQ 491 Mark
Suman has two equal masses. He drops them from the same height. He can make one to reach the ground earlier than the other by altering the:
MCQ 501 Mark
The value of g on the surface of moon is:
- A
- B
The same as on the surface of the earth
- C
More than that on the surface of the earth
- ✓
Less than that on the surface of the earth
AnswerCorrect option: D. Less than that on the surface of the earth
(d) Less than that on the surface of the earth
View full question & answer→MCQ 511 Mark
Communication satellites move in $44400\ km$ around the earth. Assume that the only force acting on it is that due to the earth, then what is acceleration of such a satellite? (Take, mass of earth $= 6 \times 10^{24}kg)$
- A
$0.3m/ s^2$
- ✓
$0.2m/ s^2$
- C
$0.4m/ s^2$
- D
$0.5m/ s^2$
AnswerCorrect option: B. $0.2m/ s^2$
$0.2m/ s^2$
View full question & answer→MCQ 521 Mark
A tank $5\ m$ is high filled with water and then is filled to the top with oil of density $0.85g/ cm^3$. Then bottom of the tank, due to these liquids is:
- A
$1.85dyne/ cm^2$
- B
$89.25dyne/ cm^2$
- ✓
$462.5dyne/ cm^2$
- D
$500dyne/ cm^2$
AnswerCorrect option: C. $462.5dyne/ cm^2$
$462.5dyne/ cm^2$
View full question & answer→MCQ 531 Mark
Which of the following is involved in buoyancy:
AnswerCorrect option: D. Both $B$ and $C$
Both $B$ and $C$
View full question & answer→MCQ 541 Mark
Which Newton's laws describe thrust:
MCQ 551 Mark
The force of gravitation exists:
- A
Only at the surface of the earth
- ✓
Everywhere in the universe
- C
- D
Only at the surface of the moon
AnswerCorrect option: B. Everywhere in the universe
(b) Everywhere in the universe
View full question & answer→MCQ 561 Mark
Two objects of different masses falling freely near the surface of moon would:
- A
Have different accelerations.
- B
Undergo a change in their inertia.
- ✓
Have same velocities at any instant.
- D
Experience forces of same magnitude.
AnswerCorrect option: C. Have same velocities at any instant.
(c) Have same velocities at any instant.
View full question & answer→MCQ 571 Mark
Choose the correct statement:
- A
Gravity and gravitation are same
- ✓
Gravity is a particular case of gravitation
- C
Acceleration due to gravity is a scalar quantity
- D
Different heavenly bodies have different values of G
AnswerCorrect option: B. Gravity is a particular case of gravitation
(b) Gravity is a particular case of gravitation
View full question & answer→MCQ 581 Mark
Which of the following has highest relative density:
MCQ 591 Mark
In the relation $\text{F}=\text{G}\times\text{M}\times\frac{\text{m}}{\text{d}^2},$ the quantity $G:$
- A
Depends on the value of g at the place of observation.
- B
Is used only when the earth is one of the two masses.
- C
Is the greatest on the surface of the earth.
- ✓
Is of the same value irrespective of the place of observation.
AnswerCorrect option: D. Is of the same value irrespective of the place of observation.
Is of the same value irrespective of the place of observation.
View full question & answer→MCQ 601 Mark
Why do we weight less on moon as compared to earth ?
- A
Because moons gravitational force is less.
- B
Because moon weight less.
- ✓
Because moon has less mass compared to earth.
- D
Because is space our weight is reduced.
AnswerCorrect option: C. Because moon has less mass compared to earth.
(c) Because moon has less mass compared to earth.
View full question & answer→MCQ 611 Mark
Why is relative density calculated with respect to the density of water particularly at $4^{\circ} \mathrm{C}$?
- A
Because water displays Archimedes principle at $4^{\circ} \mathrm{C}$
- ✓
Water has the highest density at $4^{\circ} \mathrm{C}$
- C
Water starts turning into ice at $4^{\circ} \mathrm{C}$
- D
AnswerCorrect option: B. Water has the highest density at $4^{\circ} \mathrm{C}$
(b) Water has the highest density at $4^{\circ} \mathrm{C}$
View full question & answer→MCQ 621 Mark
Any solid will sink in water, if its relative density is:
MCQ 631 Mark
The SI unit of thrust is:
- ✓
$N$
- B
- C
- D
$N^{\mathrm{m}-2}$
View full question & answer→MCQ 641 Mark
If the weight of an object in air and a dense liquid are $W_a$ and $W_l$ respectively, then upthrust:
- ✓
$W_a-W_l$
- B
$U=W_l+W_a$
- C
$U=W_l-W_a$
- D
$U=2 W_1$
AnswerCorrect option: A. $W_a-W_l$
(a) $W_a-W_l$
View full question & answer→MCQ 651 Mark
When a solid is completely immersed in a fluid, the apparent loss of weight of solid is _______ weight of fluid displaced:
MCQ 661 Mark
The force of attraction between two unit point masses separated by a unit distance is called:
- A
- B
Acceleration due to gravity.
- C
Gravitational field strength.
- ✓
Universal gravitational constant.
AnswerCorrect option: D. Universal gravitational constant.
(d) Universal gravitational constant.
View full question & answer→MCQ 671 Mark
- A
Only between the sun and the planets moving around it.
- B
Only between the earth and the bodies on it.
- ✓
Between all bodies in the universe.
- D
Only between the Sun and the earth.
AnswerCorrect option: C. Between all bodies in the universe.
(c) Between all bodies in the universe.
View full question & answer→MCQ 681 Mark
The value of g on the surface of the moon:
- A
Is the same as on the earth.
- ✓
Is less than that on the earth.
- C
Is more than that on the earth.
- D
Keeps changing day by day.
AnswerCorrect option: B. Is less than that on the earth.
(b) Is less than that on the earth.
View full question & answer→MCQ 691 Mark
The value of quantity 'G' in the law of gravitation:
- A
Depends on mass of earth only
- B
Depends on radius of earth only
- C
Depends on both mass and radius of earth
- ✓
Is independent of mass and radius of the earth
AnswerCorrect option: D. Is independent of mass and radius of the earth
(d) Is independent of mass and radius of the earth
Explaination : G is the universal constant of gravity, which doesn’t depends on mass and radius of the earth.
View full question & answer→MCQ 701 Mark
An apple of mass $100g$ falls from a tree because of gravitational attraction between the earth and the apple. If the magnitude of force exerted by the earth on the apple be $F_1$, and the magnitude of force exerted by the apple on the earth be $F_2$, then:
- A
$F_1$ is very much greater than $F_2$
- B
$F_2$ is very much greater than $F_1$
- C
$F_1$ is only a little greater than $F_2$
- ✓
$F_1$ and $F_2$ are exactly equal.
AnswerCorrect option: D. $F_1$ and $F_2$ are exactly equal.
$F_1$ and $F_2$ are exactly equal.
View full question & answer→MCQ 711 Mark
State the $S.I$. units of mass and weight:
- A
$G$ and kg
- B
$Kg$ and $g$
- ✓
$Kg$ and $N$
- D
$N$ and $kg$
AnswerCorrect option: C. $Kg$ and $N$
$Kg$ and $N$
View full question & answer→MCQ 721 Mark
Buoyant force is exerted by:
MCQ 731 Mark
The gravitational force between two bodies is
- A
Repulsive at large distances
- ✓
- C
Attractive at short distances
- D
Repulsive at short distances
Answer(b) Attractive at all places
View full question & answer→MCQ 741 Mark
Buoyant force exerted by a fluid on a given body is:
- A
Equal to the volume of body
- B
Equal to the weight of body
- ✓
Equal to the volume of fluid displaced by the body
- D
Equal to the weight of fluid displaced by the body
AnswerCorrect option: C. Equal to the volume of fluid displaced by the body
(c) Equal to the volume of fluid displaced by the body
View full question & answer→MCQ 751 Mark
In the relation $F = GM \frac{\text{m}}{\text{d}_2}$ , the quantity:
- A
Depends on the value of g at the place of observation.
- B
Is used only when the earth is one of the two masses.
- C
Is greatest at the surface of the earth.
- ✓
Is universal constant of nature.
AnswerCorrect option: D. Is universal constant of nature.
Is universal constant of nature.
View full question & answer→MCQ 761 Mark
The force that keeps the body in a circular path and is acting towards the center is called?
MCQ 771 Mark
which is a correct statement about mass ?
- A
- B
- ✓
Mass is constant everywhere.
- D
Mass is derived quantity.
AnswerCorrect option: C. Mass is constant everywhere.
(c) Mass is constant everywhere.
View full question & answer→MCQ 781 Mark
A wooden block of volume $1000cm^3$ is suspended from a spring balance. It weighs $12\ N$ in air. It is suspended in water such that half of the block is below the water. The reading of the spring balance is:
- A
$10\ N$
- B
$9\ N$
- C
$EN$
- ✓
$7\ N$
AnswerCorrect option: D. $7\ N$
$7\ N$
View full question & answer→MCQ 791 Mark
The acceleration due to gravity is zero at ______.
Answer(d) The centre of the earth
View full question & answer→MCQ 801 Mark
An object having mass equal to $350\ g$ occupies $200\ cm^3$ of the space. When this object is thrown into a river what will be the condition of this object there? (Density of water $= 1g/ cm^3$)
- A
It will float on the surface of water.
- B
It will float fully submerged in the liquid.
- ✓
It will sink in the liquid.
- D
It will float partially submerged in the liquid.
AnswerCorrect option: C. It will sink in the liquid.
It will sink in the liquid.
View full question & answer→MCQ 811 Mark
Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be:
- A
$\frac{1}{4}$ times
- ✓
$4$ times
- C
$\frac{1}{2}$ times
- D
AnswerCorrect option: B. $4$ times
$4$ times
View full question & answer→MCQ 821 Mark
To find the density of a liquid, a student used the following steps. The sequence of steps followed is given. Identify the wrong step.
$A :$ Collected displaced volume of water to know the volume $V$ of immersed body.
$B :$ Found the weight $(W)$ of the body in air
$C :$ Found the weight $W_l$, of the body in water when immersed completely.
$D :$ Found $\frac{\text{W}}{\text{V}}$ to get the result.
View full question & answer→MCQ 831 Mark
Specific gravity of substance is:
- A
Density of substance relative to density of air
- ✓
Density of substance relative to density of water
- C
Density of substance relative to density of hydrogen
- D
AnswerCorrect option: B. Density of substance relative to density of water
(b) Density of substance relative to density of water
View full question & answer→MCQ 841 Mark
The value of acceleration due to gravity of earth:
- A
Is the same on equator and poles.
- B
- ✓
- D
Increases from pole to equator.
Answer(c) Is the least on equator.
View full question & answer→MCQ 851 Mark
The S.I. units of thrust is same as that of:
MCQ 861 Mark
Which of the following is true for relative density?
MCQ 871 Mark
A body is floating in water with $\frac{2}{3}$ of its volume below the surface of water. What is the density of body?
- ✓
$666.7\ kg/m^3$
- B
$777.6\ kg/ m^3$
- C
$656.7\ kg/ m^3$
- D
$876.6\ kg/ m^3$
AnswerCorrect option: A. $666.7\ kg/m^3$
$666.7\ kg/m^3$
View full question & answer→MCQ 881 Mark
Thrust is a _______ quantity.
MCQ 891 Mark
if mass is less gravitation will be:
MCQ 901 Mark
Which of the following statement is true:
- A
$G$ is same at all places on the surface of earth.
- B
$G$ has its maximum value at the equator.
- C
$G$ is less at the earth's surface than at a height above it or a depth below it.
- ✓
$G$ is greater at the poles than at the equator.
AnswerCorrect option: D. $G$ is greater at the poles than at the equator.
$G$ is greater at the poles than at the equator.
View full question & answer→MCQ 911 Mark
The force of attraction between two unit point masses separated by a unit distance is called:
- A
- B
Acceleration due to gravity
- C
- ✓
Universal gravitational constant
AnswerCorrect option: D. Universal gravitational constant
(d) Universal gravitational constant
View full question & answer→MCQ 921 Mark
What is $G$
- A
- ✓
Acceleration due to gravity.
- C
Constant of Proportionality.
- D
$A$ or $C$
AnswerCorrect option: B. Acceleration due to gravity.
Acceleration due to gravity.
View full question & answer→MCQ 931 Mark
When a body is fully immersed in a liquid the apparent loss in the weight of body is equal to:
- A
Volume of liquid displaced by the body
- B
- ✓
Weight of liquid displaced by the body
- D
AnswerCorrect option: C. Weight of liquid displaced by the body
(c) Weight of liquid displaced by the body
View full question & answer→MCQ 941 Mark
Which among the following is not the property of weight:
- A
It is the force of gravity acting on a body
- B
It is measured by a spring balance
- C
It is variable and changes with the change in acceleration due to gravity
- ✓
View full question & answer→MCQ 951 Mark
The upward force acting on the body immersed in a fluid is called:
MCQ 961 Mark
When a solid block is fully immersed in water, the volume of the water displaced is:
- A
Greater than the volume ofthe block
- B
Less than the volume of the block
- ✓
Equal to the volume of the block
- D
Depends upon the manner in which the block is immersed in the liquid
AnswerCorrect option: C. Equal to the volume of the block
(c) Equal to the volume of the block
View full question & answer→MCQ 971 Mark
Newton's law of gravitation holds good for:
MCQ 981 Mark
The weight of the body is maximum in:
MCQ 991 Mark
The liquid in which iron can float is:
MCQ 1001 Mark
The weight of an object at the centre of the earth of radius R is:
MCQ 1011 Mark
Earth goes round the $SUN$ with:
View full question & answer→MCQ 1021 Mark
Write the approximate weight of a body of mass $5\ kg:$
- ✓
$50\ N$
- B
$5\ N$
- C
$0.5\ N$
- D
$50000\ N$
AnswerCorrect option: A. $50\ N$
$F = mg =$ Weight of body here, we consider $g =10 m / s ^2$ So, weight $=5 \times 10=50 N$
View full question & answer→MCQ 1031 Mark
The universal law of gravitation was postulated by:
MCQ 1041 Mark
Choose the correct definition of Universal law of gravitation:
- A
Every object in the universe attracts every other object with a force which is proportional to the product of the distance between them and inversely proportional to their masses.
- B
Every object in the Universe attracts every other object with a force which is inversely proportional to the square of the distance between them and proportional to the product of their masses.
- ✓
Every object in the universe attracts every other object with a force which is proportional to their masses and inversely proportional to the square of distance between them.
- D
Optaion $A$ or $C$
AnswerCorrect option: C. Every object in the universe attracts every other object with a force which is proportional to their masses and inversely proportional to the square of distance between them.
Every object in the universe attracts every other object with a force which is proportional to their masses and inversely proportional to the square of distance between them.
View full question & answer→MCQ 1051 Mark
With increase in surface area,
- A
- ✓
- C
Pressure remains unchanged
- D
View full question & answer→MCQ 1061 Mark
A book of mass $20\ g$ is placed on a table.Find the thrust exerted by the book on the table. (Take acceleration due to gravity as $10\ ms−2).$
- A
$0.1\ N$
- ✓
$0.2\ N$
- C
$0.3\ N$
- D
$0.4\ N$
AnswerCorrect option: B. $0.2\ N$
$0.2\ N$
View full question & answer→MCQ 1071 Mark
When an object is thrown up, the force of gravity.
- A
Acts in the direction of the motion.
- ✓
Acts in the opposite direction of the motion.
- C
Remains constant as the body moves up.
- D
Increases as the body moves up.
AnswerCorrect option: B. Acts in the opposite direction of the motion.
(b) Acts in the opposite direction of the motion.
View full question & answer→MCQ 1081 Mark
Increase in momentum by $20\%$ will increase the $K.E.$ by:
AnswerCorrect option: C. $44\%$
$44\%$
View full question & answer→MCQ 1091 Mark
From the following 3 solids of the same shape and same volume which one has the highest inertia:
MCQ 1101 Mark
The mass of moon is about $0.012$ times that of earth and its diameter is about $0.25$ times that of earth. The value of $G$ on the moon will be:
- A
Less than that on the earth.
- B
More than that on the earth.
- ✓
Same as that on the earth.
- D
About one-sixth of that on the earth.
AnswerCorrect option: C. Same as that on the earth.
Same as that on the earth.
View full question & answer→MCQ 1111 Mark
The force of buoyancy is equal to:
- A
- ✓
Weight of the liquid displaced by the body
- C
Apparent weight of the body
- D
AnswerCorrect option: B. Weight of the liquid displaced by the body
(b) Weight of the liquid displaced by the body
View full question & answer→MCQ 1121 Mark
Where will it be profitable to purchase one kilogram sugar:
- A
- ✓
- C
At $45^\circ$ latitude
- D
At $40^\circ$ latitude
View full question & answer→MCQ 1131 Mark
The gravitational pull exerted by the earth on a body is called its:
MCQ 1141 Mark
The value of quantity $G$ in the formula for gravitational force:
- A
Depends on mass of the earth only.
- B
Depends on the radius of earth only.
- C
Depends on both mass and radius of earth.
- ✓
Depends neither on mass nor on radius of earth.
AnswerCorrect option: D. Depends neither on mass nor on radius of earth.
Depends neither on mass nor on radius of earth.
View full question & answer→MCQ 1151 Mark
A force of $50\ N$ is applied on a nail of area $0.001\ cm^2$.Then the thrust applied is:
- ✓
$50\ N$
- B
$100\ N$
- C
$0.05\ N$
- D
$10\ N$
AnswerCorrect option: A. $50\ N$
A. $50\ N$
View full question & answer→MCQ 1161 Mark
The gravitational force of attraction between two objects is x. Keeping the masses of the objects unchanged, if the distance between the objects is halved, then the magnitude of gravitational force between them will become:
- A
$\frac{\text{x}}{4}$
- B
$\frac{\text{x}}{2}$
- C
$2\text{x}$
- ✓
$4\text{x}$
AnswerCorrect option: D. $4\text{x}$
(d) $4\text{x}$
View full question & answer→MCQ 1171 Mark
Why is the weight of an object less on the moon than on earth?
- A
Density of moon is less than density of earth
- B
Moon is a satellite of earth
- C
- ✓
Moon's gravitational force is less than that of earth
AnswerCorrect option: D. Moon's gravitational force is less than that of earth
(d) Moon's gravitational force is less than that of earth
View full question & answer→MCQ 1181 Mark
The value of $G$ depends on:
- A
The nature of the interacting bodies
- B
The size of the interacting bodies
- C
The mass of the interacting bodies
- ✓
Answer$G$ is symbol used for gravitational constant, it is a universal constant and independent from type, place, mass, density, volume everything. it is always constant.
View full question & answer→MCQ 1191 Mark
According to one of the Kepler's laws of planetary motion:
- A
$\text{r}^2\propto\text{T}^3$
- B
$\text{r}\propto\text{T}^2$
- ✓
$\text{r}^3\propto\text{T}^2$
- D
$\text{r}^3\propto\frac{1}{\text{T}^2}$
AnswerCorrect option: C. $\text{r}^3\propto\text{T}^2$
(c) $\text{r}^3\propto\text{T}^2$
View full question & answer→MCQ 1201 Mark
An object weighs $10 \ N$ in air. When immersed fully in water, it weighs only $8\ N$. The weight of the liquid displaced by the object will be:
- ✓
$2\ N.$
- B
$8\ N.$
- C
$10\ N.$
- D
$12\ N.$
AnswerCorrect option: A. $2\ N.$
$2\ N$
View full question & answer→MCQ 1211 Mark
The atmosphere is held to the earth by:
MCQ 1221 Mark
The motion of the moon around the the earth is due to which force ?
MCQ 1231 Mark
The upward force exerted by a liquid on an object is called _______?
MCQ 1241 Mark
A satellite is launched in a circular orbit of radius $R$. Another satellite is also launched in an orbit of radius $1.1R$. The period of the second satellite is larger than the first by approximately.
- A
$7.5\%$
- ✓
$1.5\%$
- C
$15\%$
- D
$10\%$
AnswerCorrect option: B. $1.5\%$
$T=\frac{2 \pi R}{\sqrt{\frac{G M}{R}}}, T \propto R^{\frac{3}{2}}$
Radius of $2^{\text {nd }}$ satellite is $1 \%$ greater Hence time period is $1 \times \frac{3}{2}=1.5 \%$ larger
View full question & answer→MCQ 1251 Mark
what is the value of $g ?$
- A
$8.9 \mathrm{~m} / \mathrm{s}^{-2}$
- B
$9.3 \mathrm{~m} / \mathrm{s}^{-2}$
- ✓
$9.8 \mathrm{~m} / \mathrm{s}^{-2}$
- D
$8.66 \mathrm{~m} / \mathrm{s}^{-11}$
AnswerCorrect option: C. $9.8 \mathrm{~m} / \mathrm{s}^{-2}$
$9.8 \mathrm{~m} / \mathrm{s}^{-2}$
View full question & answer→MCQ 1261 Mark
The school bags are generally provided with the broad strips because:
- A
It will spread the force of the bag over the large area of the shoulder of the child producing large pressure.
- ✓
It will spread the force of the bag over the large area of the shoulder of the child producing less pressure.
- C
It has become a trend among the students to carry the bags with wide strips.
- D
It will spread the force of the bag over the small area of the shoulder of the child producing less pressure.
AnswerCorrect option: B. It will spread the force of the bag over the large area of the shoulder of the child producing less pressure.
(b) It will spread the force of the bag over the large area of the shoulder of the child producing less pressure.
View full question & answer→MCQ 1271 Mark
- A
Is the quantity of the matter it contains
- B
- C
Is the same as its mass but is expressed in different unit
- ✓
Is the force with which it is attracted towards the earth
AnswerCorrect option: D. Is the force with which it is attracted towards the earth
(d) Is the force with which it is attracted towards the earth
View full question & answer→MCQ 1281 Mark
The value of gravitational constant depends upon:
- A
Temperature of the atmosphere
- B
- C
Distance between the masses
- ✓
View full question & answer→MCQ 1291 Mark
The total force exerted by a body normal to the surface is called:
MCQ 1301 Mark
Gravitational force between two objects is $10\ N$. If masses of both objects are doubled without changing distance between them, then the gravitational force would become:
- A
$2.5\ N$
- B
$20\ N$
- ✓
$40\ N$
- D
$10\ N$
AnswerCorrect option: C. $40\ N$
$40\ N$
View full question & answer→MCQ 1311 Mark
The force of attraction between two unit point masses separated by a unit distance is called
- A
- B
Acceleration due to gravity.
- C
- ✓
Universal gravitational constant.
AnswerCorrect option: D. Universal gravitational constant.
(d) Universal gravitational constant.
View full question & answer→MCQ 1321 Mark
Give reason as to why relative density has no unit:
- A
- ✓
Because it is a ratio of two dimensionally same quantities
- C
Because it is a ratio of two dimensionally different quantities
- D
AnswerCorrect option: B. Because it is a ratio of two dimensionally same quantities
(b) Because it is a ratio of two dimensionally same quantities
View full question & answer→MCQ 1331 Mark
If a rock is brought from the surface of the moon, then :
- A
- ✓
Its weight will change but not mass
- C
Both mass and weight will change
- D
Its mass and weight both will remain same
AnswerCorrect option: B. Its weight will change but not mass
(b) Its weight will change but not mass
View full question & answer→MCQ 1341 Mark
Any solid will float in water if its relative density is:
MCQ 1351 Mark
Specific gravity of the body is numerically equal to ________ of the body:
MCQ 1361 Mark
As a body moves from the equator to the poles, the value of g experienced by the body:
- A
- ✓
- C
- D
First decreases then increases
View full question & answer→MCQ 1371 Mark
A boy is whirling a stone tied with a string in an horizontal circular path. If the string breaks, the stone:
- A
Will continue to move in the circular path.
- B
Will move along a straight line towards the centre of the circular path.
- ✓
Will move along a straight line tangential to the circular path.
- D
Will move along a straight line perpendicular to the circular path away from the boy.
AnswerCorrect option: C. Will move along a straight line tangential to the circular path.
(c) Will move along a straight line tangential to the circular path.
View full question & answer→MCQ 1381 Mark
Four balls, $A, B, C$ and $D$ displace $10\ mL, 24\ mL, 15\ mL$ and $12\ mL$ of a liquid respectively, when immersed completely. The ball which will undergo the maximum apparent loss in weight will be:
View full question & answer→MCQ 1391 Mark
View full question & answer→MCQ 1401 Mark
The mass of moon is about $0.012$ times that of the earth and its diameter is about $0.25$ times that of earth. The value of G on the moon will be:
- ✓
Same as that on the earth.
- B
About one-fifth of that on the earth.
- C
About one-sixth of that on the earth.
- D
About one-fourth of that on the earth.
AnswerCorrect option: A. Same as that on the earth.
Same as that on the earth.
View full question & answer→MCQ 1411 Mark
The force of attraction between two unit point masses separated by a unit distance is called:
- A
- B
Acceleration due to gravity.
- C
- ✓
Universal gravitational constant.
AnswerCorrect option: D. Universal gravitational constant.
(d) Universal gravitational constant.
View full question & answer→MCQ 1421 Mark
Choose the correct unit for the relative density among the following:
- A
$kg/cm$
- B
- C
$kg/cm$
- ✓
$kg/m^3$
AnswerCorrect option: D. $kg/m^3$
$kg/m^3$
View full question & answer→MCQ 1431 Mark
Two particles are placed at some distance from each other. If, keeping the distance between them unchanged, the mass of each of the two particles is doubled, the value of gravitational force between them will become:
AnswerCorrect option: C. $4\text{ times}$
$4$ times
View full question & answer→MCQ 1441 Mark
Which one of the following statements is true:
- ✓
Archimedes' principle can also be applied to gases
- B
The buoyant force depends on the nature of object immersed in the liquid.
- C
Ice floats in water because the density of ice is more than that of water.
- D
Force acting on a unit area is called thrust.
AnswerCorrect option: A. Archimedes' principle can also be applied to gases
(a) Archimedes' principle can also be applied to gases
View full question & answer→MCQ 1451 Mark
Does the force of gravitation exist between two astronauts in space:
- ✓
- B
- C
Only under special circumstances
- D
Answer(a) Yes, always
Explaination : Yes, there will be gravitational force between the two astronauts in space because every object in universe, whether small or large, exerts a force on every other object.
View full question & answer→MCQ 1461 Mark
Which scientist found the value of $G?$
View full question & answer→MCQ 1471 Mark
The earth and the moon are attracted to each other by gravitational force. The earth attracts the moon with a force that is:
- A
More than that exerted by the moon.
- ✓
Same as that exerted by the moon.
- C
Less than that exerted by the moon.
- D
Not related to that exerted by the moon.
AnswerCorrect option: B. Same as that exerted by the moon.
(b) Same as that exerted by the moon.
Explaination : According to the universal law of gravitation, two objects with masses attract each other with equal gravitational force, but in opposite directions.
This force is given by
$
F=G \frac{M m}{r^2}
$
Hence, the earth attracts the moon with the same force with which the moon attracts the earth.
View full question & answer→MCQ 1481 Mark
The value of quantity G in the law of gravitation:
- A
Depends on mass of earth only.
- B
Depends on radius of earth only.
- C
Depends on both mass and radius of earth.
- ✓
Is independent of mass and radius of the earth.
AnswerCorrect option: D. Is independent of mass and radius of the earth.
(d) Is independent of mass and radius of the earth.
View full question & answer→MCQ 1491 Mark
Acceleration due to gravity (due to the shell) at any point inside the shell is:
- ✓
- B
Zero as long as no other mass is inside.
- C
Zero as long as no other mass is outside the shell.
- D
View full question & answer→MCQ 1501 Mark
Newton's law of gravitation is universal law, because it:
- A
Acts on all bodies and particles in the universe.
- ✓
It acts on all the masses at all distances and not affected by the medium.
- C
- D
AnswerCorrect option: B. It acts on all the masses at all distances and not affected by the medium.
(b) It acts on all the masses at all distances and not affected by the medium.
View full question & answer→MCQ 1511 Mark
When a body is dipped completly or partially into a liquid, then weight $(w)$ of the liquid displaced by the body and upthrust force on the body into the liquid are related as:
- ✓
$w = F$
- B
$w < F$
- C
$w > F$
- D
AnswerCorrect option: A. $w = F$
$w = F$
View full question & answer→MCQ 1521 Mark
Three spheres have radii $1\ cm, 2\ cm$ and $3\ cm$, respectively. Which sphere exerts maximum pressure on earth?
View full question & answer→MCQ 1531 Mark
An object is put one by one in three liqui having different densities. The object floats with $\frac{1}{9}, \frac{2}{11},$ and $\frac{3}{7}$ parts of their volumes outside the liquid surface in liquids of densities $\mathrm{d}_1, \mathrm{d}_2$ and $\mathrm{d}_3$ respectively. Which of the following statement is correct?
- A
$d_1 > d_2 > d_3$
- B
$d_1 > d_2 < d_3$
- C
$d_1 < d_2 > d_3$
- ✓
$d_1 < d_2 < d_3$
AnswerCorrect option: D. $d_1 < d_2 < d_3$
$d_1 < d_2 < d_3$
View full question & answer→MCQ 1541 Mark
The weight of an object at the centre of the earth of radius $R$ is:
View full question & answer→MCQ 1551 Mark
When an object moves with a constant acceleration, under the influence of force of gravitation of the earth only, the object is said to have:
MCQ 1561 Mark
The universal law of gravitation gives the gravitational force between
- A
The Earth and a point mass only
- B
The Earth and the Sun only
- ✓
Any two bodies having some mass
- D
AnswerCorrect option: C. Any two bodies having some mass
(c) Any two bodies having some mass
View full question & answer→MCQ 1571 Mark
A girl stands on a box having $60\ cm$ length, $40\ cm$ breadth and $20\ cm$ width in three ways. In which of the following cases, pressure exerted by the brick will be:
- A
Maximum when length and breadth form the base.
- ✓
Maximum when breadth and width form the base.
- C
Maximum when width and length form the base.
- D
The same in all the above three cases.
AnswerCorrect option: B. Maximum when breadth and width form the base.
Maximum when breadth and width form the base.
View full question & answer→MCQ 1581 Mark
The correct equation to show relation between $G$ and $g$ is:
- A
$G = Mm/d^2$
- ✓
$G = Mm/R^2$
- C
$G = G Mm/d^2$
- D
$G = Gm/R^2$
AnswerCorrect option: B. $G = Mm/R^2$
$G = Mm/R^2$
View full question & answer→MCQ 1591 Mark
If suddenly the gravitational force of attraction between earth and satellite revolving around it becomes zero, then the satellite will
- A
Continue to move in its orbit with same velocity
- ✓
Move tangential to the original orbit with the same velocity
- C
Becomes sationary in its orbit
- D
AnswerCorrect option: B. Move tangential to the original orbit with the same velocity
(b) Move tangential to the original orbit with the same velocity
View full question & answer→MCQ 1601 Mark
Acceleration due to gravity of a body during free fall does not depend upon the:
- A
- ✓
- C
Universal gravitational constant
- D
View full question & answer→MCQ 1611 Mark
The mean radius of the earth's orbit round the sun is $1.5 × 10^{11}$. The mean radius of the orbit of mercury round the sun is $6 \times 10^{10}$ m. The mercury will rotate around the sun in:
AnswerCorrect option: C. Nearly $\frac{1}{4}\text{years}$.
Nearly $\frac{1}{4}\text{years}$.
View full question & answer→MCQ 1621 Mark
The gravitational force between two objects is $F$. If masses of both objects are halved without changing distance between them, then the gravitational force would become:
- ✓
$\frac{\text{F}}{4}$
- B
$\frac{\text{F}}{2}$
- C
$\text{F}$
- D
$2\text{F}$
AnswerCorrect option: A. $\frac{\text{F}}{4}$
$\frac{\text{F}}{4}$
View full question & answer→MCQ 1631 Mark
A rectangular wooden block has length, breadth and height of $50 \ cm, 25\ cm$ and $10\ cm$, respectively. This wooden block is kept on ground in three different ways, turn by turn. Which of the following is the correct statement about the pressure exerted by this block on the ground?
- A
The maximum pressure is exerted when the length and breadth form the base.
- B
The maximum pressure is exerted when length and height form the base.
- ✓
The maximum pressure is exerted when breadth and height form the base.
- D
The minimum pressure is exerted when length and height form the base.
AnswerCorrect option: C. The maximum pressure is exerted when breadth and height form the base.
The maximum pressure is exerted when breadth and height form the base.
View full question & answer→MCQ 1641 Mark
The law of gravitation gives the gravitational force between:
- A
The earth and a point mass only.
- B
The earth and the sun only.
- ✓
Any two bodies having some mass.
- D
Any two charged bodies only.
AnswerCorrect option: C. Any two bodies having some mass.
(c) Any two bodies having some mass.
View full question & answer→MCQ 1651 Mark
The total force exerted by the body perpendicular to the surface is called:
MCQ 1661 Mark
Apparent loss of weight of a body when immersed in a liquid can be explained on the basis of:
Answer(c) Archimedes' principle.
View full question & answer→MCQ 1671 Mark
Thrust is which type of force:
- A
- ✓
- C
Both parallel and perpendicular
- D
View full question & answer→MCQ 1681 Mark
Buoyant force experienced by a solid is _____ the weight of the fluid displaced by it:
MCQ 1691 Mark
An object is put one by one in three liquids having different densities. The object floats with $\frac{1}{9},\frac{2}{11}\ \text{and}\ \frac{3}{7}$parts of their volumes outside the liquid surface in liquids of densities $\mathrm{d}_1, \mathrm{d}_2$ and $\mathrm{d}_3$respectively. Which of the following statement is correct?
- A
$d_1 > d_2 > d_3$
- B
$d_1 > d_2 < d_3$
- C
$d_1 < d_2 > d_3$
- ✓
$d_1 < d_2 < d_3$
AnswerCorrect option: D. $d_1 < d_2 < d_3$
$d_1 < d_2 < d_3$
View full question & answer→MCQ 1701 Mark
The mass of a body on earth is 60kg. Its mass on moon will be:
- A
$360\ kg$
- ✓
$60\ kg$
- C
$10\ kg$
- D
$1/ 6 \ kg$
AnswerCorrect option: B. $60\ kg$
$60\ Kg$
View full question & answer→MCQ 1711 Mark
A body of mass $6\ kg$ immerses in water partially. If the body displaces $100g$ of water, then the apparent weight of the body is:
- ✓
$59\ N$
- B
$40\ N$
- C
$49\ N$
- D
$60\ N$
AnswerCorrect option: A. $59\ N$
$59\ N$
View full question & answer→MCQ 1721 Mark
The _________ force is responsible for providing the necessary centripetal force to planets moving around the Sun.
MCQ 1731 Mark
An object is put in three liquids having different densities, one by one. The object floats with $\frac{1}{9},\frac{2}{11}$ and $\frac{3}{7}$ parts of its volume outside the surface of liquids of densities $\mathrm{d}_1, \mathrm{~d}_2$ and $\mathrm{d}_3$ respectively. Which of the following is the correct order of the densities of the three liquids ?
- A
$d_1 > d_2 > d_3$
- B
$d_2 > d_3 > d_1$
- ✓
$d_1 < d_2 < d_3$
- D
$d_3 > d_2 > d_1$
AnswerCorrect option: C. $d_1 < d_2 < d_3$
(c) $d_1 < d_2 < d_3$
View full question & answer→