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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 11
36.
If 100 V is the peak voltage across the secondary of the transformer in a half-wave rectifier (without any filter circuit), then the maximum voltage on the reverse-biased diode is
200 V
141.4 V
100 V
86 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
The O/P Power of a power amplifier is several times its input power. It is possible because
power amplifier introduces a -ve resistance
there is +ve feed back in the circuit
step up transformer is use in the circuit
power amplifier converts a part of I/P d.c. power into a.c. power
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
In p type semiconductor holes are majority carriers.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Due to the formation of Schottky defects the density of the crystal
increases slightly
increases appreciably
decreases slightly
decreases appreciably
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
The band gap of silicon at 300K is
1.36 eV
1.10 eV
0.80 eV
0.67 eV
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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