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Physics

Physics
Good conductor of electricity is

Kerosene
Dry air
Graphite
Paper

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Physics
The optical phenomenon that is primarily responsible for the observation of rainbow on a rainy day is

Dispersion
Reflection
Diffraction
Interference

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Physics
Ultra violet radiations of the Sun do not reach the earth because, earth's atmosphere is surrounded by

Ammonia
Carbon dioxide
Chlorine
Ozone

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Physics
A person standing on a railway platform listens to the whistles of arriving and departing trains. The whistle heard is

Of higher intensity when train arrives
Of higher pitch when train arrives
Of higher pitch when train departs
The same in both cases in all respects

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Physics
We feel cool when we sit near the fan, this is because

Fan cools surrounding air.
We feel cool when air touches the body.
Fan gives cool air.
Air vapourises the sweat on our body.

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Physics
The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as

Megasonics
Ultrasonics
Audible sounds
Infrasonics

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MORE MCQ ON Physics

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