Physics Questions

Q:

______________ of a wave is the rate of transfer of energy per unit area perpendicular to the direction of travel of the wave.

A) Interference B) Rectification
C) Intensity D) Diffraction
 
Answer & Explanation Answer: C) Intensity

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Q:

At what distance from the earth is gravity zero

Answer

Gravitational force is the force that binds everything at the surface of the earth. It holds at what distance from the earth is gravity zero. 

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Q:

The energy that generates wind comes from what source?

A) Anemometers B) Solar radiation
C) Ocean currents D) None of the above
 
Answer & Explanation Answer: B) Solar radiation

Explanation:

Wind is nothing but the form of moving air. It is caused by the uneven heating of the earth's surface by the sun. Hence, the energy that generates wind comes from solar radiation.

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Q:

A body of mass 18 kg is moving with a velocity of 6 m/s, find its momentum.

A) 108 B) 4.5
C) 54 D) 9
 
Answer & Explanation Answer: A) 108

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Q:

Meter in a vehicle that calculates distance covered by the vehicle is called __________.

A) Speedometer B) Odometer
C) Thermometer D) Kilometre
 
Answer & Explanation Answer: B) Odometer

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Q:

What is the phenomenon which established the transverse nature of light ?

A) Reflection B) Interference
C) Diffraction D) Polarisation
 
Answer & Explanation Answer: D) Polarisation

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Q:

An object having a capability to do work is said to possess __________.

A) force B) moment
C) momentum D) energy
 
Answer & Explanation Answer: D) energy

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Q:

If the kinetic energy of a body becomes 256 times its initial value, then the new linear momentum will be

A) 8 times the initial value B) 16 times the initial value
C) the same as the initial value D) 32 times the initial value
 
Answer & Explanation Answer: B) 16 times the initial value

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