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Physics

Physics
Which one among the following is not an electromagnetic wave?

Infrared Ray
Cathode Ray
R-Ray
X-Ray

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Physics
During uniform motion of an object along a straight line, its ________ remains constant with time.

Velocity
Deceleration
Force
Acceleration

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Physics
The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be:

1 T
2 T
8 T
4 T

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Physics
Hot springs are heated geothermally by underlying

Water
None of these
Magma
Mitula

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Physics
An optically plane surface reflects a beam of light

As a diffused beam in one direction
As diffused beams in all directions
As a parallel beam in one direction
As parallel beams in all directions

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Physics
Optical fibre works on the

interference
total internal reflection
scattering
principle of refraction

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