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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 14
6.
The cut in voltage
is the same for silicon and germanium diodes
is a forward voltage
is a reverse voltage
is a forward voltage below which the current is very small
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
With an ac input from 50 Hz power line, the ripple frequency is
50 Hz in the dc output of half wave as well as full wave rectifier
100 Hz in the dc output of half wave as well as full wave rectifier
50 Hz in the dc output of half wave and 100 Hz in the dc output of full wave
100 Hz in the dc output of half wave and 50 Hz in the dc output of full wave
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
For an insulating material, dielectric strength and dielectric loss should be respectively
high and high
low and high
high and low
low and low
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
Semiconductors have
aero temperature coefficient of resistance
positive temperature coefficient of resistance
negative temperature coefficient of resistance
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
The dipole moment per unit volume as a function of E in the case of an insulator is given by (symbols have the usual meaning).
P = ε0E (εr - E)
P = ε0E
P =
P =
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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