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Physics

Physics
The term photon refers to

None of these
Light ray
Radiation
Sub atomic particle

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Physics
Materials for rain-proof coats and tents owe their water-proof properties to

elasticity
viscosity
surface tension
specific gravity

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Physics
The device which converts sound energy into electrical energy is called

Microphone
Transmitter
Amplifier
Speaker

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Physics
Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in

42 seconds
4.2 years
4.2 seconds
42 years

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Physics
The theory of relativity is presented by which scientist

Marie Curie
Albert Einstein
Isaac Newton
Stephen Hawking

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Physics
. . . . . . . . . exerts a force on anything that has an electric charge.

Electric field
Electrostatic force
All of these
Inductive field

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