Physics Questions

Q:

Which of the following can do more work?

A) A rotating wheel B) A moving bullet
C) A speeding stone D) A raised hammer
 
Answer & Explanation Answer: B) A moving bullet

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Q:

The speed of the light is maximum in

A) Air B) Vacuum
C) Water D) Glass
 
Answer & Explanation Answer: B) Vacuum

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Q:

Find the potential energy gained by a body of mass 25 kg, if it is raised by 5 m. (use g = 10 m/s2)

A) 1250 B) 50
C) 625 D) 25
 
Answer & Explanation Answer: A) 1250

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Q:

According to Ohm's law, if current (I) increase and potential difference (V) remains constant, then

A) resistance unchanged B) resistance decreases
C) potential difference decreases D) resistance increases
 
Answer & Explanation Answer: B) resistance decreases

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Q:

When a compressed slinky is released it converts potential energy into

A) Heat energy B) Mechanical energy
C) Chemical energy D) Kinetic energy
 
Answer & Explanation Answer: D) Kinetic energy

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Q:

Which is the form of energy that does NOT occur while riding a bicycle?

A) Heat energy B) Kinetic energy
C) Chemical energy D) Mechanical energy
 
Answer & Explanation Answer: C) Chemical energy

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Q:

Why does a piece of cloth, which appears green in sunlight, appear black when it is viewed under red light?

 

A) The cloth completely absorbs red colour wavelength B) It is due to refraction
C) It is the effect of scattering of light D) It is due to Parallax error
 
Answer & Explanation Answer: A) The cloth completely absorbs red colour wavelength

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Q:

Echocardiogram is more closely related to

A) Doppler effect B) Zeeman effect
C) Photoelectric effect D) Magnetic effect
 
Answer & Explanation Answer: A) Doppler effect

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