Physics Questions

Q:

Who does not the kinetic energy of an object increase with?

A) Friction B) Time
C) Mass D) Speed
 
Answer & Explanation Answer: D) Speed

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Q:

What happens to the Potential and Kinetic energies of a body as it falls down from a height?

A) Its Potential energy decreases while its Kinetic energy increases B) There is no change in its Potential or Kinetic energy
C) Its Potential and Kinetic energies decrease D) Its Potential energy increases while its Kinetic energy decreases
 
Answer & Explanation Answer: A) Its Potential energy decreases while its Kinetic energy increases

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Q:

The centre of the reflecting surface of a spherical mirror is called the

A) radius B) centre of curvature
C) pole D) focus
 
Answer & Explanation Answer: C) pole

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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:

___ is not related to gases.

A) Boyle's Law B) Joule's Law
C) Avogadro's Law D) Charle's Law
 
Answer & Explanation Answer: B) Joule's Law

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Q:

A man lifts a luggage of 25 kg from the ground and puts it on the head, 2.5 m above the ground. If the value of g = 10 m/s2, then the value of work done by him on the luggage is

A) 22.5 J B) 225 J
C) 625 J D) 220 J
 
Answer & Explanation Answer: C) 625 J

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Q:

Which of the following statements is true with respect to Glucometer?

A) It is a medical device B) It is a non-medical device
C) It is used to measure oxygen level in the air D) It is used to measure nitrogen level in the air
 
Answer & Explanation Answer: A) It is a medical device

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Q:

Calculate the time period (in seconds) of a sound wave of wavelength 5m travelling with a speed of 500 m/s.

 

A) 0.01 B) 2500
C) 0.02 D) 1250
 
Answer & Explanation Answer: A) 0.01

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