Physics Questions

Q:

If a force acts upon two objects at rest, and having different masses for the same amount of time, then which one of the following will be the same for both the objects?

A) Acceleration B) Kinetic Energy
C) Velocity D) Momentum
 
Answer & Explanation Answer: D) Momentum

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Q:

Mohan, having a mass of 40 kg, runs up a staircase of 50 steps in 10 s. If the height of each step is 15 cm, then what is his power?

A) 300 W B) 200 W
C) 100 W D) 400 W
 
Answer & Explanation Answer: A) 300 W

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Q:

Which motion has magnitude of static frictional force directly proportional to normal reaction?

A) Impending motion B) Actual motion
C) Both 1 and 2 D) None of the above
 
Answer & Explanation Answer: A) Impending motion

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Q:

If a body slides over a surface, the force resisting the motion between them is called ______.

A) Centripetal force B) Friction
C) Centrifugal force D) Inertia
 
Answer & Explanation Answer: B) Friction

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Q:

Which phenomena shows the particle nature of light?

A) Diffraction B) Interference
C) Photoelectric effect D) Polarisation
 
Answer & Explanation Answer: C) Photoelectric effect

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Q:

______ is the perpendicular distance between point of application of force and axis of rotation.

A) Moment arm B) Moment of Inertia
C) Altitude D) Base
 
Answer & Explanation Answer: A) Moment arm

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Q:

The unit of measurement of noise is

A) Decibel B) Hertz
C) Amplifier D) Acoustics
 
Answer & Explanation Answer: A) Decibel

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Q:

Unit of impedance is ___________.

A) ohm B) henry
C) tesla D) hertz
 
Answer & Explanation Answer: A) ohm

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