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Physics

Physics
The plastic material commonly used for making gear wheels is

Bakelit
Polystyrene
Polyesters
Nylons

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Physics
The energy of a photon, whose momentum is 10 MeV/c, where c is the speed of light, is given by

100 MeV
0.1 MeV
10 MeV
1 MeV

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Physics
Decibel is the unit used for

Radio wave frequency
Intensity of sound
Intensity of heat
Speed of light

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Physics
Rain drops acquire spherical shape due to

Surface tension
Friction
Viscosity
Elasticity

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Physics
Which of the following waves cannot be polarised?

Ultrasonic
Ultra violet
Infrared
Radio

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Physics
Transition ions absorb light in :

Microwave region
Infrared region
Visible region
Ultraviolet region

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