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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

All of these
Semiconductors
Metals
Insulators

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Electronic Devices and Circuits
Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface.

True
False

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Electronic Devices and Circuits
Light dependent resistors are

Highly doped semiconductor
Lightly doped semiconductor
Either A or B
Intrinsic semiconductor

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Electronic Devices and Circuits
As compared to bipolar junction transistor, a FET

All of these
Is less noisy
Has higher input resistance
Has better thermal stability

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Electronic Devices and Circuits
A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is

1.01
99
100
0.99

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Electronic Devices and Circuits
Silicon is not suitable for fabrication of light emitting diodes because it is

Wideband gap semiconductor
An indirect band gap semiconductor
Narrowband gap semiconductor
Direct band gap semiconductor

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