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Physics

Physics
In SONAR which kind of wave is used?

Ultrasonic
Radio
Audible sound
Infrasonic

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Physics
One Kilowatt hour is equal to -

3.6 Mega Joule
3.8 Mega Joule
3.2 Mega Joule
4.0 Mega Joule

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Physics
A small piece of a substance is weakly attracted by a strong magnetic field. The substance is

Non-magnetic
Paramagnetic
Ferromagnetic
Diamagnetic

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Physics
If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to ________.

30 m
300 m
0.3 m
3 m

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Physics
When a vehicle passes, TV reception gets distorted. This is because

Metal reflects radiowaves
Vehicle pollution affects the performance of the TV components
Spark plug creates electromagnetic disturbances
Modern vehicles use electroignition system

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

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

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