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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

Semiconductors
Insulators
Metals
All of these

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

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

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

PIN diode
Schottky diode
Tunnel diode
Zener diode

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Electronic Devices and Circuits
Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is

In the direction of current
In arbitrary direction
Antiparallel to magnetic field
Normal to both current and magnetic field

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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

100
0.99
1.01
99

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

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

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