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Physics

Physics
The atmospheric air is held to the Earth by :

Rotation of the Earth
Clouds
Winds
Gravity

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Physics
A person does some work of 1,000 J in 2 s. His power will be ________

500W
25W
1000W
50W

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Physics
Addition of suitable impurities into semiconductor, is called

Doping
Forming
Mixing
Diluting

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

Stratosphere
Troposphere
Mesosphere
Ionosphere

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Physics
A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will

Increase
Decrease
Remain unaffected
Have its shape changed

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Physics
Which of the following scientific discoveries was made by C.V. Raman?

Controlled nuclear fission
Super Conductivity
Cyclotron
Inelastic scattering of light by molecules

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