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Physics

Physics
For which Diode is used ?

Amplification
Oscillation
Modulation
Purification

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Physics
The velocity required to place a vehicle in orbit around the moon is ________ that required to place it in orbit round the earth.

Less than
Greater than or equal to
Equal to
Greater than

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Physics
For photoelectric effect to take place, the metal used as the cathode should have ________

Low work function
Low melting point
Low resistance
High melting point

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Physics
Sound of frequency below 20 Hz is called

supersonics
ultrasonic
audio sounds
infrasonic

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Physics
If electric resistance is to be decreased, then the number of resistances should be connected in ________

Parallel
None of these
Mixed arrangement
Series

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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

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

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