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Electronic Devices and Circuits

Electronic Devices and Circuits
Forbidden energy gap in germanium at 0 K is about

0.78 eV
2 eV
10 eV
5 eV

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Electronic Devices and Circuits
For a P-N diode, the number of minority carriers crossing the junction depends on

None of these
Rate of thermal generation of electron hole pairs
Forward bias voltage
Potential barrier

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

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

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Electronic Devices and Circuits
An electron in the conduction band

Loses its charge easily
Jumps to the top of the crystal
Has lower energy than the electron in the valence band
Has higher energy than the electron in the valence band

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Electronic Devices and Circuits
In which of these is reverse recovery time nearly zero?

PIN diode
Tunnel diode
Schottky diode
Zener diode

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Electronic Devices and Circuits
For a NPN bipolar transistor, what is the main stream of current in the base region?

Drift of electrons
Diffusion of electrons
Diffusion of holes
Drift of holes

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