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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 6
31.
When a ferromagnetic substance is magnetised, there are small changes in its dimensions. This phenomenon is called
hysteresis
magnetostriction
diamagnetism
bipolar relaxation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
Gold is often diffused into silicon PN junction devices to
increase the recombination rate
reduce the recombination rate
make silicon a direct gap semiconductor
make silicon semimetal
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
In the figure shows the circuits symbol of
FET
PMOSFET
CMOSFET
NMOSFET
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.

Assertion (A): FET is a unipolar device.

Reason (R): BJT is bipolar device.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
Ferrites are
ferromagnetic materials
ferrimagnetic materials
ferroelectric materials
ferri-ferromagnetic materials
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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