MCQ 11 Mark
What will be the weight of a person on the earth, who weighs 9N on the moon?
- A3 N
- B15 N
- C45 N
- ✓54 N
Answer
View full question & answer→Correct option: D.
54 N
54 N
Questions
M.C.Q
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31 questions · 26 auto-graded MCQ + 5 self-marked written.
MCQ 21 Mark
How much will a person with 72 N weight on the earth, weigh on the moon?
- ✓12 N
- B36 N
- C21 N
- D63 N
Answer
View full question & answer→Correct option: A.
12 N
12 N
Question 31 Mark
The escape velocity of a body from the earth’s surface, $v_{sec}$ = …….
Answer
View full question & answer→$\sqrt{\frac{2 G M}{R}}$
MCQ 41 Mark
The SI unit of the universal constant of gravitation is ……
- ✓$N \cdot m ^2 / kg ^2$
- BN.kg ${ }^2 / m ^2$
- C$m / s ^2$
- D$kg \cdot m / s ^2$
Answer
View full question & answer→Correct option: A.
$N \cdot m ^2 / kg ^2$
$N \cdot m ^2 / kg ^2$
Question 51 Mark
In the usual notation, the acceleration due to gravity at a height h from the surface of the earth is ……..
Answer
View full question & answer→g = $\frac{G M}{(R+h)^{2}}$
MCQ 61 Mark
The gravitational force between two particles separated by a distance r varies as ……..
- A$\frac{1}{r}$
- Br
- C$r^2$
- ✓$\frac{1}{r^{2}}$
Answer
View full question & answer→Correct option: D.
$\frac{1}{r^{2}}$
$\frac{1}{r^{2}}$
MCQ 71 Mark
The periodic time of a planet is $T$ and the mean distance of the planet from the Sun is $r$, then according to Kepler's third law $..........$
- ✓$T ^2 \alpha r ^3$
- B$T \alpha r ^3$
- C$T ^2 \alpha r$
- D$T ^3 \alpha r ^2$
Answer
View full question & answer→Correct option: A.
$T ^2 \alpha r ^3$
$T^{2 }\alpha r^3$
MCQ 81 Mark
The square of time period of revolution around the Sun is __________ to the cube of the mean distance of the planet from the Sun.
- Ainversely proportional
- ✓directly proportional
- Cnot proportional
- Ddepend
Answer
View full question & answer→Correct option: B.
directly proportional
directly proportional
MCQ 91 Mark
The straight line joining the planet and the Sun sweeps equal __________ in equal interval of time.
- Avolume
- Bangle
- Cdensity
- ✓area
Answer
View full question & answer→Correct option: D.
area
area
MCQ 101 Mark
The orbit of a planet is an ellipse with the Sun at one of the __________.
- ✓foci
- Bcentre
- Cmiddle
- Dsurface
Answer
View full question & answer→Correct option: A.
foci
foci
MCQ 111 Mark
The gravitational potential energy at the height of 'h' from the ground is __________.
- A$\frac{- GMm }{ R + h }$
- B$\frac{- GMm _1}{ R ^2+ h }$
- C$\frac{ GMm _1}{ R ^2+ h ^2}$
- D$\frac{ GMm }{ R ^2+ h }$
Answer
View full question & answer→$\frac{-G M m}{R+h}$
MCQ 121 Mark
A body of mass $1 \ kg$ is attracted by the Earth with a force which is equal to $.......$
- ✓$9.8 \ N$
- B$6.67 \times 10^{-11}$
- C$1 \ N$
- D$9.8 \ m/s$
Answer
View full question & answer→Correct option: A.
$9.8 \ N$
$9.8 \ N$
MCQ 131 Mark
The weight of body gradually decreases from __________.
- Aequator to poles
- ✓poles to equator
- Cpole to pole
- Dheight to surface
Answer
View full question & answer→Correct option: B.
poles to equator
poles to equator
MCQ 141 Mark
The radius of the Earth is $......m$.
- ✓$6.4 \times 10^6$
- B$4.6 \times 10^6$
- C$4.6 \times 10^{-6}$
- D$6 \times 10^{24}$
Answer
View full question & answer→Correct option: A.
$6.4 \times 10^6$
$6.4\times10^6$
MCQ 151 Mark
The mass of the Earth is $.......kg$.
- A$6 \times 10^6$
- ✓$6 \times 10^{24}$
- C$6.4 \times 10^6$
- D$6.4 \times 10^{24}$
Answer
View full question & answer→Correct option: B.
$6 \times 10^{24}$
$6 \times 10^{24}$
MCQ 161 Mark
According to Newton's first law, if mass is more, then the inertia of the body is __________.
- Aless
- Bvery less
- ✓more
- Dcan't say
Answer
View full question & answer→Correct option: C.
more
more
MCQ 171 Mark
The mass of objects __________ at any surface on the Earth.
- ✓remains constant
- Bis non-uniform
- Cchanges
- Dincreases
Answer
View full question & answer→Correct option: A.
remains constant
remains constant
MCQ 181 Mark
As the height of the object from the surface of the Earth increases, value of 'g' becomes __________.
- Amore
- ✓less
- Cequal
- Dcan't say
Answer
View full question & answer→Correct option: B.
less
less
MCQ 191 Mark
The value of 'g' at the depth from the ground goes on __________.
- Aincreasing
- Bfluctuating
- ✓decreasing
- Dvarying
Answer
View full question & answer→Correct option: C.
decreasing
decreasing
MCQ 201 Mark
When an object is thrown upward, the force of gravity __________.
- ✓Is opposite to the direction of motion
- BIs in the same direction as that of motion
- Cbecomes zero at higher point
- DIncrease as it rise up
Answer
View full question & answer→Correct option: A.
Is opposite to the direction of motion
Is opposite to the direction of motion
MCQ 211 Mark
The value of 'g' due to Earth is zero at __________.
- ACentre of Earth
- BPoles
- CInfinite distance
- ✓Both a and c
Answer
View full question & answer→Correct option: D.
Both a and c
Both a and c
MCQ 221 Mark
The value of '$g$' is maximum at poles and it is __________.
- A$9.72 \ m/s$
- ✓$9.83 \ m/s^2$
- C$9.83 \ m/s$
- D$9.72 \ m/s^2$
Answer
View full question & answer→Correct option: B.
$9.83 \ m/s^2$
$9.83 \ m/s^2$
MCQ 231 Mark
The value of acceleration due to gravity at the height 'h' from the ground is __________.
- A$g=\frac{G M}{R+h}$
- B$g =\frac{ GM }{\sqrt{ R + h }}$
- C$g =\frac{ GM }{( R + h )^2}$
- D$g=G M(R+h)^2$
Answer
View full question & answer→$g =\frac{G M}{(R+h)^2}$
MCQ 241 Mark
Acceleration is a __________ quantity.
- Ascalar
- Bfundamental
- Cunit
- ✓vector
Answer
View full question & answer→Correct option: D.
vector
vector
MCQ 251 Mark
The $SI$ unit of gravitational constant is $......$
- ✓$Nm ^2 / kg ^2$
- B$Nkg ^2 / m ^2$
- C$m / s ^2$
- D$N \ cm ^2 / g ^2$
Answer
View full question & answer→Correct option: A.
$Nm ^2 / kg ^2$
$Nm^2/kg^2$
MCQ 261 Mark
The Earth attracts moon with a force of $10^{20}N$ . The moon attracts Earth with a force of $......$
- Aless than $10^{20} N$
- ✓$10^{20} N$
- Cgreater than $10^{20} N$
- D$10^{-20} N$
Answer
View full question & answer→Correct option: B.
$10^{20} N$
$10^{20} N$
MCQ 271 Mark
The gravitational force causes __________.
- ATides
- BCircular motion of moon
- CNone of these
- ✓Both a and b
Answer
View full question & answer→Correct option: D.
Both a and b
both a and b
MCQ 281 Mark
The gravitational force on the surface of the Moon is __________ times than that on the surface of the Earth.
- Afive
- Bone fifth
- ✓one sixth
- Dsix
Answer
View full question & answer→Correct option: C.
one sixth
one sixth
MCQ 291 Mark
If the distance between two objects increases 5 times, the gravitational force becomes __________ times.
- A5
- B15
- ✓$\frac{1}{25}$
- D25
Answer
View full question & answer→Correct option: C.
$\frac{1}{25}$
$\frac{1}{25}$
MCQ 301 Mark
If the distance between two bodies becomes half, the gravitational force between them becomes __________.
- Ahalf
- Bone forth
- ✓4 times
- D2 times
Answer
View full question & answer→Correct option: C.
4 times
4 times
MCQ 311 Mark
The gravitational force of attraction between two objects is given by __________.
- A$F \alpha \frac{ m _1 m_2}{d^2}$
- B$F \alpha \frac{ d ^2}{m_1 m_2}$
- C$F \alpha \frac{ m _1 m_2}{\sqrt{ d ^2}}$
- D$F \alpha \frac{ m _1 m_2}{d^3}$
Answer
View full question & answer→$F \alpha \frac{m_1 m_2}{d^2}$