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ELECTRONIC DEVICES AND CIRCUITS

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

Ferroelectric characteristic only above the curie point
Electric dipole moment
High dielectric constant
No hysteresis

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

Schottky diode
Zener diode
PIN diode
Tunnel 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
Fermi level is the amount of energy in which

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

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