Physics Questions

Q:

Find the potential energy gained by a body of mass 60 kg, if it is raised by 12 m. (use g = 10 m/s2)

 

A) 7200 B) 50
C) 3600 D) 25
 
Answer & Explanation Answer: A) 7200

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Q:

Fill in the blank with the most appropriate option.

 

18 volts = ___ x 3 ohms

 

A) 6 amperes B) 6 watts
C) 6 milliamperes D) 6 joules
 
Answer & Explanation Answer: A) 6 amperes

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Q:

The speed of sound in air at 0°is

 

A) 331 m/s B) 330 m/s
C) 330 ms D) 331 ms
 
Answer & Explanation Answer: A) 331 m/s

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Q:

In which of the following examples will an athlete have maximum accelerated motion?

 

A) Running on an octagonal track B) Running on a hexagonal track
C) Running on a rectangular track D) Running on a circular track
 
Answer & Explanation Answer: D) Running on a circular track

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Q:

The value of acceleration due to gravity (g) ____.

 

A) is greater at the poles than at the equator B) is lesser at the poles than at the equator
C) is greater at the North pole than at the South pole D) is greater at the South pole than at the North pole
 
Answer & Explanation Answer: A) is greater at the poles than at the equator

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Q:

The most suitable unit for expressing nuclear radius is

A) micro B) nanometre
C) fermi D) angstrom
 
Answer & Explanation Answer: C) fermi

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Q:

A boy raises a box with a weight of 120N through a height of 2 m. The work done by him is

 

A) 60 J B) 120 J
C) 240 J D) 180 J
 
Answer & Explanation Answer: C) 240 J

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Q:

According to ohm's law, which of the following is true?

 

A) The current flowing through a wire is directly proportional to the Potential Difference applied across its ends B) The current flowing through a wire is directly proportional to its resistance
C) The current flowing through a wire is indirectly proportional to its length D) The current flowing through the wire is indirectly proportional to the Potential Difference applied across its ends  
 
Answer & Explanation Answer: A) The current flowing through a wire is directly proportional to the Potential Difference applied across its ends

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