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Physics

Physics
An object which absorbs all colours and reflects none appears:

Grey
White
Blue
Black

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Physics
If the phase difference between two points is 120° for a wave with velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is

24 cm
12 cm
6 cm
1 cm

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Physics
Which of the following is not caused by atmospheric refraction of light ?

Sun appearing red at sunset
Twinkling of stars at night
Sun appearing higher in the sky than it actually is
Sun becoming visible two or three minutes before actual sunrise

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Physics
Radio waves sent out by a radio stations are reflected by

Mesosphere
Troposphere
Stratosphere
Ionosphere

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Physics
When hot-water is sprinkled on a hotter glass tumbler, it breaks because

Glass reacts chemically with water
Water evaporates
Glass suddenly expands
Glass suddenly contracts

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Physics
Which of the metals has the maximum thermal conductivity?

Iron
Aluminium
Copper
Silver

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MORE MCQ ON Physics

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