Physics Questions

Q:

A wave with high amplitude have

A) high pitch B) low energy
C) high energy D) low pitch
 
Answer & Explanation Answer: C) high energy

Explanation:

The amplitude of a wave is a measure of the displacement of the wave from its rest position i.e, half the distance from its highest point to its lowest point.


Amplitude is proportional to the energy of a wave.

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2 1807
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

Explanation:
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Q:

The increasing order of the refractive index of certain materials is (left to right) .......

A) Rocksalt, Benzene, Kerosene, Ice B) Rock Salt, Ice, Benzene, Kerosene
C) Ice, Kerosene, Benzene, Rock Salt D) Kerosene, Ice, Benzene, Rock Salt
 
Answer & Explanation Answer: C) Ice, Kerosene, Benzene, Rock Salt

Explanation:
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Q:

The molecular mass of a gas is ________

A) twice its vapour pressure B) equal to its vapour pressure
C) half its vapour pressure D) not related to its vapour pressure
 
Answer & Explanation Answer: A) twice its vapour pressure

Explanation:
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Q:

1kWh = ?

A) 3.6 x 105 J B) 3.6 x 106 J
C) 3.6 x 10-5 J D) 3.6 x 10-6 J
 
Answer & Explanation Answer: B) 3.6 x 106 J

Explanation:
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Q:

Soap bubble attains spherical shape due to ______.

A) inertia B) pressure
C) surface tension D) Viscosity
 
Answer & Explanation Answer: C) surface tension

Explanation:
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Q:

Find the power of a convex lens if the image formed is at a distance of 10 cm from the lens when the object is placed on the other side of the lens at 40 cm from the optical centre?

A) 12.5 diopters B) 7.5 diopters
C) -12.5 diopters D) -7.5 diopters
 
Answer & Explanation Answer: A) 12.5 diopters

Explanation:
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0 1790
Q:

Nautical miles is a unit of distance used in

A) Navigation B) Road mile
C) Astronomy D) Measuring the boundaries of a nation
 
Answer & Explanation Answer: A) Navigation

Explanation:
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