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Electronic Devices and Circuits

Electronic Devices and Circuits
The forbidden energy gap between the valence band and conduction band will be least in case of

Metals
All of these
Semiconductors
Insulators

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

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

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Electronic Devices and Circuits
Which of the following has highest resistivity?

Mineral oil
Paraffin wax
Air
Mica

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

Reverse bias
Zero or reverse bias
Zero bias
Forward bias

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Electronic Devices and Circuits
Which variety of copper has the best conductivity?

Copper containing traces of silicon
Hard drawn copper
Induction hardened copper
Pure annealed copper

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

Electrons
Holes
Holes and electrons
Ions

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