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Physics

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

Infrared Ray
X-Ray
Cathode Ray
R-Ray

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Physics
If the diameter of a capillary is doubled, then the rise of water in it will be

Two times
Four times
No change
Half

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Physics
Which of the following supports particle nature of photons ?

Polarization
Interference
Diffraction
Photoelectric effect

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Physics
The wall of a dam is made thicker at the bottom than at the top because the pressure exerted by the water on the wall

Depends on the area of the wall
Increases with height of the wall
Increases with depth of the wall
Depends on the thickness of the wall

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Physics
In a Cinema hall, the distance between the projector and the screen is increased by 2%. Then the intensity of illumination on the screen is

Decreased by 4%
Increased by 2%
Decreased by 2%
Increased by 4%

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Physics
Speed of sound in air is unaffected by change in

Humidity
Temperature
Volume
Pressure

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