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Physics

Physics
Sound waves do not show the phenomenon of

Polarisation
Interference
Refraction
Diffraction

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Physics
A mass of 20 kg is at a height of 8 m above the ground. Then the potential energy possessed by the body is: [Given g = 9.8 m/s2]

1568 N
1568 J
1568 W
1568 C

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Physics
Solids which conduct electricity at higher temperature but not at lower temperature are called

Semi-conductor
Super-conductor
Metallic-conductor
Insulator

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Physics
Name the process by which bubbles from liquid are formed?

Surface Tension
Degasification
Effervescence
Surface Energy

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Physics
Kepler's law of planetary motion states that the square of the time period is proportional to the

Fourth power of the semi-major axis
Cube of the semi-major axis
Semi-major axis
Square of the semi-major axis

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Physics
A nuclear reactor is said to have become 'critical' when

It stops due to malfunctioning
It starts emitting dangerous radioactive radiations
It is ready to produce controlled energy
It is shut down to avoid explosion

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