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Electronic Devices and Circuits

Electronic Devices and Circuits
When avalanche breakdown occurs covalent bonds are not affected.

False
True

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Electronic Devices and Circuits
Fermi level is the amount of energy in which

None of these
A hole can have at room temperature
An electron can have at room temperature
Must be given to an electron move to conduction band

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Electronic Devices and Circuits
At room temperature the current in an intrinsic semiconductor is due to

Holes and electrons
Ions
Holes
Electrons

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Electronic Devices and Circuits
If too large current passes through the diode

All electrons will leave
Diode will emit light
All holes will freeze
Excessive heat may damage the diode

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Electronic Devices and Circuits
In a bipolar transistor, the emitter base junction has

Zero or reverse bias
Reverse bias
Forward bias
Zero bias

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Electronic Devices and Circuits
Permalloy is

A polymer
A conon-ferrous alloy used in aircraft industry
A variety of stainless steel
A nickel an iron alloy having high permeability

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