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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

Insulators
All of these
Metals
Semiconductors

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Electronic Devices and Circuits
In a half wave rectifier, the load current flows

Only for the positive half cycle of the input signal
Only for the negative half cycle of the input signal
For full cycle
For less than fourth cycle

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Electronic Devices and Circuits
Permalloy is

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

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

Holes and electrons
Electrons
Ions
Holes

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

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

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

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

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