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Physics

Physics
For which Diode is used ?

Oscillation
Amplification
Purification
Modulation

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Physics
Vehicles use ________ to see the objects coming from behind.

Concave lens
Concave mirror
Convex mirror
Convex lens

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Physics
An oil drop spreads over water because

Oil does not mix with water
water has a higher surface tension
Oil is lighter than water
Oil is more viscous

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Physics
Which of the following is an example of simple harmonic motion?

Motion of a ceiling fan
Ball bouncing on floor
Earth spinning on its axis
Simple pendulum motion

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Physics
If the length of a simple pendulum is halved then its period of oscillation is

Decreased by a factor 2
Doubled
Halved
Increased by a factor 2

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Physics
The device used to change the speed of an electric fan is

Switch
Rectifier
Amplifier
Regulator

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