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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
Metals
Semiconductors
Insulators

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

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

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

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

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

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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 less than fourth cycle
For full cycle

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Electronic Devices and Circuits
Permalloy is

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

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