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

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

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Physics
Mica is used in electrical appliances such as electric iron because mica is

a bad conductor of heat as well as electricity
a good conductor of heat but a bad conductor of electricity
a bad conductor of heat but a good conductor of electricity
a good conductor of heat as well as electricity

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