Physics-01
IInd level NTSE prep
- 1.
Impulse is
- A.
A scalar quantity
- B.
A vector quantity
- C.
Neither a vector nor a vector
- D.
Sometimes a scalar and sometimes a vector
Correct Answer
B. A vector quantity -
- 2.
Choose the wrong statement
- A.
1 kg wt= 9.8N
- B.
Momentum is a vector quantity
- C.
Force is always conserved
- D.
Momentum is conserved in the absence of an external force
Correct Answer
C. Force is always conserved -
- 3.
A long jumper runs before jumping because
- A.
He covers a greater distance
- B.
He maintains momentum conservation
- C.
He gains energy by conserving
- D.
He gains momentum
Correct Answer
D. He gains momentum -
- 4.
If a rock is brought from the surface of the moon
- A.
Its mass will change
- B.
Its weight will change, but not mass.
- C.
Both mass and weight will change
- D.
Its mass and weight will remain the same
Correct Answer
B. Its weight will change, but not mass. -
- 5.
If 1 kg wt= 10 N, the value of gravitational intensity will be
- A.
10 m/s 2
- B.
1/10 m/s 2
- C.
1 m/s 2
- D.
1/100 m/s 2
Correct Answer
A. 10 m/s 2 -
- 6.
The force acting on a mass of 1g due to the gravitational pull on the earth is called 1 gwt. One gwt equals
- A.
1 N
- B.
9.8 N
- C.
980 dyne
- D.
None of these
Correct Answer
C. 980 dyne -
- 7.
The weight of a body would not be zero
- A.
At the centre of the earth
- B.
During a free fall
- C.
In interplanetary space
- D.
On a frictionless surface.
Correct Answer
D. On a frictionless surface. -
- 8.
An iron ball and a wooden ball of the same radius are released from a height H in vacuum. The times taken by both of them to reach the ground are
- A.
Roughly equal
- B.
Unequal
- C.
Exactly equal
- D.
In the inverse ratio of their diameters.
Correct Answer
C. Exactly equal -
- 9.
A man is standing on a boat in still water. If he walks towards the shore the boat will
- A.
Move away from the shore
- B.
Remain stationary
- C.
Move towards the shore
- D.
Sink
Correct Answer
A. Move away from the shore -
- 10.
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 the magnitude of the force exerted by astronaut A on astronaut B is
- A.
Equal to zero.
- B.
Equal to the force exerted by B on A.
- C.
Greater than the force exerted by B on A.
- D.
Less than the force exerted by B on A.
Correct Answer
B. Equal to the force exerted by B on A. -
- 11.
In the above problem, during a push
- A.
The acceleration of A is greater than that of B.
- B.
The acceleration of A is less than that of B.
- C.
Neither is accelerated.
- D.
Their accelerations are equal in magnitude but opposite in direction.
Correct Answer
B. The acceleration of A is less than that of B. -
- 12.
If the momentum of a body is doubled, the kinetic energy is
- A.
Halved
- B.
Unchanged
- C.
Doubled
- D.
Becomes 4 times
Correct Answer
D. Becomes 4 times -
- 13.
If action and reaction were to act on the same body
- A.
The resultant would be zero
- B.
The body would not move at all
- C.
Both a and b are correct
- D.
Neither a nor b are correct
Correct Answer
C. Both a and b are correct -
- 14.
A stationery ball weighing 0.25 kg acquires a speed of 10 m/s when hit by a hockey stick. The impulse imparted to the ball is
- A.
2.5 N s
- B.
2.0 N s
- C.
1.5 N s
- D.
0.5 N s
Correct Answer
A. 2.5 N s -
- 15.
It is difficult to walk on ice because of
- A.
Absence of friction
- B.
Absence of inertia
- C.
More inertia
- D.
More friction
Correct Answer
A. Absence of friction -
- 16.
Any solid will sink in water if its relative density is
- A.
Less than unity
- B.
Equal to unity
- C.
Greater than unity.
- D.
Infinite
Correct Answer
C. Greater than unity. -
- 17.
An ice cube is floating in a glass of water. What happens to the water level when the ice melts?
- A.
Rises
- B.
Falls
- C.
Remains same
- D.
First rises and then falls
Correct Answer
C. Remains same -
- 18.
A block of wood floats in water with 2/3 of its volume submerged. Its relative density is
- A.
1/3
- B.
2/3
- C.
4/3
- D.
1/9
Correct Answer
B. 2/3 -
- 19.
A man sitting in a train in motion is facing the engine. He tosses a coin up, the coin falls behind him. The train is moving
- A.
Forward with uniform speed
- B.
Backward with uniform speed.
- C.
Forward with acceleration
- D.
Forward with deceleration
Correct Answer
C. Forward with acceleration -
- 20.
In a tug of war between the team A and B, the rope breaks at a point which is nearer to A. Then
- A.
A has applied more force
- B.
B has applied more force
- C.
A and B both have applied same force.
- D.
None has applied any force.
Correct Answer
B. B has applied more force -
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Jan 11, 2013Quiz Edited by
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Apr 15, 2010Quiz Created by
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