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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 16
1.
Voltage series feedback (Also called series-shunt feedback) results in
increase in both I/P and O/P impedances
decrease in both I/P and O/P impedances
increase in I/P impedance and decrease in O/P impedance
decrease in I/P impedance and increase in O/P impedance
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
How many free electrons does a p type semiconductor has?
only those produced by thermal energy
only those produced by doping
those produced by doping as well as thermal energy
any of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Which of the following has highest resistivity?
Mica
Paraffin wax
Air
Mineral oil
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.

Assertion (A): In p-n-p transistor collector current is termed negative.

Reason (R): In p-n-p transistor holes are majority carriers.

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.
5.
The sensitivity of human eyes is maximum at
white portion of spectrum
green portion of spectrum
red portion of spectrum
violet portion of spectrum
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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