Physics Questions

Q:

According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the ____ of an object.

A) density B) volume
C) force D) mass
 
Answer & Explanation Answer: D) mass

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Q:

If an object moves in a purely rotatory motion, then each constituent particle of the body moves in a circle, the centre of which is located on a line is called _______.

A) the axis of rotation B) the line of rotation
C) the spinning rod D) the fixed line
 
Answer & Explanation Answer: A) the axis of rotation

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Q:

The atomic bomb is based on the principle of

A) Uncontrolled nuclear fusion B) Uncontrolled nuclear fission
C) Controlled nuclear fission D) Controlled nuclear fusion
 
Answer & Explanation Answer: B) Uncontrolled nuclear fission

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Q:

Which one among the following components is used as an amplifying device?

A) Transformer B) Diode
C) Capacitor D) Transistor
 
Answer & Explanation Answer: D) Transistor

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Q:

If the force applied on the object is in the direction opposite to the direction of motion, the speed of the object __________.

A) increases B) stops
C) decreases D) no effect
 
Answer & Explanation Answer: C) decreases

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Q:

Which phenomenon is responsible for the echo of sound wave?

A) Reflection B) Refraction
C) Interference D) Polarisation
 
Answer & Explanation Answer: A) Reflection

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Q:

What type of force acts on a car moving around a curve?

A) Centrifugal force B) Cohesive force
C) Centripetal force D) Gravitational force
 
Answer & Explanation Answer: C) Centripetal force

Explanation:

It is a force that acts on a body moving in a circular path and is directed towards the centre around which the body is moving is called as Centripetal force.

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Q:

Fundamental duties are included in the Indian Constitution by the_________Amendment.

A) 44th B) 42nd
C) 26th D) 25th
 
Answer & Explanation Answer: B) 42nd

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