Electronic Devices and Circuits - ECE Questions and Answers

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Permalloy is

A variety of stainless steel

A polymer

A conon-ferrous alloy used in aircraft industry

A nickel an iron alloy having high permeability

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Which one of the following is not a characteristic of a ferroelectric material?

High dielectric constant

No hysteresis

Ferroelectric characteristic only above the curie point

Electric dipole moment

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In which of these is reverse recovery time nearly zero?

Zener diode

Tunnel diode

Schottky diode

PIN diode

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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

Normal to both current and magnetic field

In the direction of current

Antiparallel to magnetic field

In arbitrary direction

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Fermi level is the amount of energy in which

A hole can have at room temperature

An electron can have at room temperature

Must be given to an electron move to conduction band

None of the above

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In monolithic ICs, all the components are fabricated by

Diffusion process

Oxidation

Evaporation

None

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When diodes are connected in series to increase voltage rating the peak inverse voltage per junction

should not exceed half the breakdown voltage

should not exceed the breakdown voltage

should not exceed one third the breakdown voltage

may be equal to or less than breakdown voltage