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Physics

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

Amplifier
Regulator
Rectifier
Switch

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Physics
The width of depletion layer of a P-N junction

Is independent of applied voltage
Increases with heavy doping
Decreases with light doping
Is increased under reverse bias

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Physics
Alternating current is converted into direct current by a

Oscillator
Rectifier
Transformer
Dynamo

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Physics
Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?

Neither
Both
100 W
25 W

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Physics
Sending a frame to a group of stations is known as

Casting
Multicasting
Spreading
Single casting

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Physics
In beta decay what is emitted

Proton
Neutron
All of these
Electron

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MORE MCQ ON Physics

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