Physics Questions

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:

Fill in the blank with the most appropriate option.

 

The Universal Constant of Gravitation is ___.

 

A) 6.67 x 1010 Nm2/kg2 B) 6.67 x 10-10 Nm2/kg2
C) 6.67 x 10-11 Nm2/kg2 D) 9.8 Nm2/kg2
 
Answer & Explanation Answer: C) 6.67 x 10-11 Nm2/kg2

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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:

Mechanical energy is the combination of kinetic energy and

 

A) Heat energy B) Chemical energy
C) Potential energy D) Nuclear energy
 
Answer & Explanation Answer: C) Potential energy

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Q:

We obtain average _____________ by dividing the total energy consumed by the total time taken.

 

A) force B) power
C) torque D) momentum
 
Answer & Explanation Answer: B) power

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Q:

Which statement best describes the formation of diamonds?

 

A) Diamonds form in talc under very high pressure. B) Diamonds form in kimberlites under very high pressure.
C) Diamonds form in kimberlites under very low pressure. D) Diamonds form in talc under very low pressure.
 
Answer & Explanation Answer: B) Diamonds form in kimberlites under very high pressure.

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Q:

Which of the following is false?

 

Sound waves are ___ waves.

 

A) Pressure B) Longitudinal
C) Electromagnetic D) Mechanical
 
Answer & Explanation Answer: C) Electromagnetic

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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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