Physics Questions

Q:

The apparent weight of a person in a lift which is moving down with uniform acceleration is _______.

A) greater than the weight when the person is stationary B) twice the weight when the person is stationary
C) less than the weight when the person is stationary D) same as the weight when the person is stationary
 
Answer & Explanation Answer: C) less than the weight when the person is stationary

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Q:

The boiling point of an alcohol is 78°C. What is the temperature in Kelvin scale?

A) 78K B) 341 K
C) 373 K D) 351 K
 
Answer & Explanation Answer: D) 351 K

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Q:

Who discovered theory of relativity?

A) Isaac Newton B) Albert Einstein
C) Niel Bohr D) Michael Faraday
 
Answer & Explanation Answer: B) Albert Einstein

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Q:

The first equation of motion gives the relation between

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

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Q:

A covex mirror of focal length f (in air) is immersed in a liquid (u=4/3). The focal length of the mirror in the liquid will be :

A) f B) (4/3)f
C) (3/4)f D) (7/3)f
 
Answer & Explanation Answer: A) f

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Q:

Which of the following is not a vector quantity?

A) Acceleration B) Electric current
C) Force D) Velocity
 
Answer & Explanation Answer: B) Electric current

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Q:

What is the SI unit of intensity of sound?

A) Decible B) Newton
C) Heartz D) Tesla
 
Answer & Explanation Answer: A) Decible

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Q:

A galvanometer can be converted to a voltmeter by connecting

A) a high resistance in parallel B) a high resistance in series
C) a low resistance in series D) a low resistance in parallel
 
Answer & Explanation Answer: B) a high resistance in series

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