Physics Questions

Q:

Which of the following is a characteristic of an exothermic reaction?

A) Release of heat B) Absorption of heat
C) Doesn't involve any change in temperature D) None of the option is correct
 
Answer & Explanation Answer: A) Release of heat

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Q:

1 pascal equals 1 ________________.

A) N m2 B) N m-2
C) N m D) N m-1
 
Answer & Explanation Answer: B) N m-2

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Q:

The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called

A) velocity B) force
C) momentum D) inertia
 
Answer & Explanation Answer: D) inertia

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Q:

In which of the following mentioned activities is the potential energy (P.E) converted into kinetic energy(K.E)?

A) The explosion of a fire cracker B) The switching on of a torch
C) The switching off of a torch D) The swinging of a pendulum
 
Answer & Explanation Answer: D) The swinging of a pendulum

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Q:

Two particles with charges q1 and q2 are kept at a certain distance to exert force F on each other. If the distance is reduced to one-fifth, then the force between them is

A) F/25 B) 5F
C) F/5 D) 25F
 
Answer & Explanation Answer: D) 25F

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Q:

An object weighing 20 kg is raised through a height of 2 m. What will be the work done by the force of gravity in this process?

A) 400 J B) 50 J
C) 40 J D) 100 J
 
Answer & Explanation Answer: A) 400 J

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Q:

The kinetic energy of a ball weighing 0.5 kg moving with a velocity of 4 m/s will be

A) 16 J B) 4 J
C) 8 J D) 12 J
 
Answer & Explanation Answer: B) 4 J

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Q:

What is the reason for formation of Mirage in desert?

A) Refraction of light B) Reflection of light
C) Total internal reflection of light D) Both Refraction and Total internal reflection of light
 
Answer & Explanation Answer: D) Both Refraction and Total internal reflection of light

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