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Physics

Physics
Which is the point from where an azimuth originates?

South
North
East
West

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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 4%
Increased by 2%
Decreased by 2%

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Physics
The working of a rocket is based on the principle of:

Conservation of energy
Conservation of angular momentum
Conservation of momentum
Conservation of mass

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Physics
A barometer is kept inside a bell jar. Air is slowly pumped out of the jar.

The bell jar breaks up
The mercury level starts rising
The mercury level starts falling
The mercury level does not change

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Physics
Which one of the following is responsible for the working of Newton's colour disc experiment ?

Formation of impure spectra
Principle of complementary colour
Persistence of vision
Formation of pure spectra

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Physics
Coolis tube is used to produce

Radio waves
X-rays
Micro waves
Gama rays

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