Download App

Science M.C.Q. [I MARKS]

Force and Pressure · Gujarat Board (GSEB) STD 8 (GSEB - English Medium). 28 questions.

Questions

M.C.Q. [I MARKS]

Take a timed test

28 questions · auto-graded multiple-choice test.

MCQ 11 Mark
Image
A brick is kept in three different ways on a table as shown in figure. The pressure exerted by the brick on the table will be
  • ✓
    maximum in position A
  • B
    maximum in position C
  • C
    maximum in position B
  • D
    equal in all cases
Answer
Correct option: A.
maximum in position A
A
View full question & answer→
MCQ 21 Mark
During dry weather while combing hair, sometimes we experience hair flying apart. The force responsible for this is
  • A
    force of gravity
  • ✓
    electrostatic force
  • C
    force of friction
  • D
    magnetic force
Answer
Correct option: B.
electrostatic force
B
View full question & answer→
MCQ 31 Mark
In figure, two boys A and B are shown applying force on a block. If the block moves towards the right. which one of the following statements is correct ?
Image
  • ✓
    Magnitude of force applied by A is greater than that of B.
  • B
    Magnitude of force applied by A is smaller than that of B.
  • C
    Net force on the block is towards A.
  • D
    Magnitude of force applied by A is equal to that of B.
Answer
Correct option: A.
Magnitude of force applied by A is greater than that of B.
A
View full question & answer→
MCQ 41 Mark
P, Q, R and S are four solid objects having the same mass. Which object is exerting the least pressure on the table ?
Image
  • A
    P
  • ✓
    Q
  • C
    R
  • D
    S
Answer
Correct option: B.
Q
B
View full question & answer→
MCQ 51 Mark
In the circuit shown in figure, when the circuit is completed, the hammer strikes the gong. Which of the following force is responsible for the movement of hammer ?
Image
  • A
    Gravitational force alone
  • B
    Electrostatic force alone
  • ✓
    Magnetic force alone
  • D
    Frictional force alone
Answer
Correct option: C.
Magnetic force alone
C
View full question & answer→
MCQ 61 Mark
Assertion (A) A football rolling along the ground, gradually slows down and finally comes to rest.
Reason (R) This happens due to force of friction between the ball and the ground.
  • A
    Both A and R are true and R is the correct explanation of A
  • B
    Both A and R are true but R is not the correct explanation of A
  • ✓
    A is true but R is false
  • D
    A is false but R is true
Answer
Correct option: C.
A is true but R is false
C
View full question & answer→
MCQ 71 Mark
Assertion (A) Fruit falls on the ground when they get detached from the tree.
Reason (R) The force responsible for this action is electrostatic force.
  • A
    Both A and R are true and R is the correct explanation of A
  • B
    Both A and R are true but R is not the correct explanation of A
  • ✓
    A is true but R is false
  • D
    A is false but R is true
Answer
Correct option: C.
A is true but R is false
C
View full question & answer→
MCQ 81 Mark
when a stone is rotated on a circular path uniformly, the effect of force will be
  • A
    change in direction and magnitude of motion.
  • B
    change in shape of object.
  • ✓
    change in direction of motion only.
  • D
    change in magnitude only.
Answer
Correct option: C.
change in direction of motion only.
C
View full question & answer→
MCQ 91 Mark
Which of these is not true for force ?
  • A
    A force can change the state of motion of an object
  • B
    A force can change the shape of an object
  • ✓
    A force can act between two solid objects only
  • D
    Forces applied on an object in the same direction add to one another
Answer
Correct option: C.
A force can act between two solid objects only
C
View full question & answer→
MCQ 101 Mark
Which of these is an example of a contact force ?
  • A
    A guava falling from the tree.
  • B
    A magnet attracting a hanging iron nail.
  • C
    A plastic comb attracting small pieces of hair.
  • ✓
    A boat moving on water by the action of wind on its sail.
Answer
Correct option: D.
A boat moving on water by the action of wind on its sail.
D
View full question & answer→
MCQ 111 Mark
Assertion (A) The larger the area, smaller is the pressure.
Reason (R) The force acting on a unit area of a surface is called pressure.
  • ✓
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
Answer
Correct option: A.
Both A and R are true and R is the correct explanation of A.
(A) According to the definition of pressure,
Pressure $=\frac{\text { Force }}{\text { Area }} \Rightarrow$ Pressure $\propto \frac{1}{\text { Area }}$
Both statements are correct. Hence, option (A) is correct.
View full question & answer→
MCQ 121 Mark
Assertion (A) Electrostatic force is a contact force.
Reason (R) The force exerted by a charged body on another charged body is known as electrostatic force.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • ✓
    A is false but R is true.
Answer
Correct option: D.
A is false but R is true.
(D) A is false because electrostatic force is a non-contact force. Hence, option (D) is correct.
View full question & answer→
MCQ 131 Mark
Assertion (A) In the game of tug of war, sometimes the rope does not seem to move to any side even if strong forces are applied from both sides.
Reason (R) Equal forces applied from opposite side on object make the net applied force zero.
  • ✓
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
Answer
Correct option: A.
Both A and R are true and R is the correct explanation of A.
(A) Both statements are correct. If net force on a body is zero, then it does not move. Hence, the correct option is (A).
View full question & answer→
MCQ 141 Mark
Assertion (A) Push or pull on an object is called force.
Reason (R) Forces add together, if they are applied in opposite direction.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • ✓
    A is true but R is false.
  • D
    A is false but R is true.
Answer
Correct option: C.
A is true but R is false.
(C) A is true but R is false, because forces applied in same direction add together.
View full question & answer→
MCQ 151 Mark
How much pressure would be exerted by a block exerting 20 N of force on 0.5 m2 area ?
  • A
    10 N/m2
  • B
    20 N/m2
  • C
    30 N/m2
  • ✓
    40 N/m2
Answer
Correct option: D.
40 N/m2
D
View full question & answer→
MCQ 161 Mark
The standard value of atmospheric pressure is
  • A
    78 cm of Hg
  • ✓
    76 cm of Hg
  • C
    45 cm of Hg
  • D
    0.76 cm of Hg
Answer
Correct option: B.
76 cm of Hg
B
View full question & answer→
MCQ 171 Mark
Image
A water tank has four taps fixed at points A, B, C, D as shown in figure. The water will flow out at the same pressure from taps at
  • ✓
    B and C
  • B
    C and D
  • C
    A and B
  • D
    A and C
Answer
Correct option: A.
B and C
A
View full question & answer→
MCQ 181 Mark
Figure shows a container filled with water. Which of the following statements is correct about pressure of water ?
Image
  • A
    Pressure at $A>$ Pressure at $B>$ Pressure at $C$
  • B
    Pressure at $A=$ Pressure at $B=$ Pressure at $C$
  • C
    Pressure at $A<$ Pressure at $B>$ Pressure at $C$
  • ✓
    Pressure at $A<$ Pressure at $B<$ Pressure at $C$
Answer
Correct option: D.
Pressure at $A<$ Pressure at $B<$ Pressure at $C$
D
View full question & answer→
MCQ 191 Mark
Some mustard oil is kept in the beaker. It will exert pressure
  • A
    upward
  • B
    downward
  • C
    sideways
  • ✓
    in all the directions
Answer
Correct option: D.
in all the directions
D
View full question & answer→
MCQ 201 Mark
The pressure exerted by liquid due to increase in depth
  • A
    reduces
  • ✓
    increases
  • C
    remains same
  • D
    depends on the nature of liquid
Answer
Correct option: B.
increases
B
View full question & answer→
MCQ 211 Mark
A block of mass 2 kg tied with a rope is going down under the force of gravity of 20 Ν.
Image
How much force is required by the hand to stop the motion of the block ?
  • A
    10 N
  • ✓
    20 N
  • C
    30 N
  • D
    40 N
Answer
Correct option: B.
20 N
B
View full question & answer→
MCQ 221 Mark
Like poles exert a force of
  • A
    attraction
  • B
    repulsion
  • C
    Both (a) and (b)
  • ✓
    None of these
Answer
Correct option: D.
None of these
D
View full question & answer→
MCQ 231 Mark
The wear and tear in the machine part is due to
  • A
    electrostatic force
  • B
    muscular force
  • ✓
    frictional force
  • D
    gravitational force
Answer
Correct option: C.
frictional force
C
View full question & answer→
MCQ 241 Mark
Type of force where only attraction is found
  • A
    electrostatic force
  • B
    magnetic force
  • ✓
    gravitational force
  • D
    Both (a) and (b)
Answer
Correct option: C.
gravitational force
C
View full question & answer→
MCQ 251 Mark
Two objects repel each other, this repulsion could be due to
  • A
    frictional force
  • B
    electrostatic force
  • C
    magnetic force
  • ✓
    either a magnetic or an electrostatic force
Answer
Correct option: D.
either a magnetic or an electrostatic force
D
View full question & answer→
MCQ 261 Mark
Which one of the following forces is a contact force ?
  • A
    Force of gravity
  • ✓
    Force of friction
  • C
    Magnetic force
  • D
    Electrostatic force
Answer
Correct option: B.
Force of friction
B
View full question & answer→
MCQ 271 Mark
Force due to the charged particles is known as
  • A
    muscular force
  • B
    magnetic force
  • ✓
    electrostatic force
  • D
    gravitational force
Answer
Correct option: C.
electrostatic force
C
View full question & answer→
MCQ 281 Mark
When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water In the dropper is due to
  • A
    pressure of water
  • B
    gravity of the earth
  • C
    shape of rubber bulb
  • ✓
    atmospheric pressure
Answer
Correct option: D.
atmospheric pressure
D
View full question & answer→
Generate Paper FreeAll Force and Pressure topics
M.C.Q. [I MARKS] - Science STD 8 Questions - Vidyadip