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Electronic Devices and Circuits

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

Zero or reverse bias
Zero bias
Reverse bias
Forward bias

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

2 eV
5 eV
0.78 eV
10 eV

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

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

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

Holes and electrons
Ions
Holes
Electrons

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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

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

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

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

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