Physics Questions

Q:

One nanometer is

 

A) 10-11 m B) 10-10 m
C) 10-8 m D) 10-9 m
 
Answer & Explanation Answer: D) 10-9 m

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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:

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.

 

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:

In Force equation, F is equal to

 

A) ma B) mv
C) u+at D) mgh
 
Answer & Explanation Answer: A) ma

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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:

What is the SI unit of pressure

A) Pascal B) Dyne
C) Newton D) Jule
 
Answer & Explanation Answer: A) Pascal

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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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