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 Physics Questions

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Q:

Light can travel ___ km in a year.

A) 5 billion B) 10 billion
C) 5 trillion D) 10 trillion
 
Answer & Explanation Answer: D) 10 trillion

Explanation:
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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:

An incident ray strikes a plane mirror at an angle of 20 deg with the mirror. The angle between the incident ray and reflected ray is ____.

 

A) 140 deg B) 40 deg
C) 50 deg D) 20 deg
 
Answer & Explanation Answer: A) 140 deg

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Q:

The second equation of motion gives the relation between

A) Velocity and time B) Position and velocity
C) Position and time D) Velocity and acceleration
 
Answer & Explanation Answer: C) Position and time

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Q:

If the distance travelled by an object is zero, then the displacement of the object

A) is zero B) is negative
C) is positive D) may or may not be zero
 
Answer & Explanation Answer: A) is zero

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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:

Which type of electromagnetic radiation has the shortest wavelength?

A) Gamma rays B) X-rays
C) Radio waves D) Infrared rays
 
Answer & Explanation Answer: A) Gamma rays

Explanation:

The order of wavelengths of electromagnetic spectrum is as follows ::

(Shortest to Longest) - Gamma, X-Rays, UV, Visible, Infrared, Microwaves, Radio Waves.

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Q:

Which among the following is not an environment friendly mode of producing electricity?

A) Thermal Power B) Solar Power
C) Wind Energy D) Bio-waste
 
Answer & Explanation Answer: A) Thermal Power

Explanation:
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