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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 7
11.
The maximum rectification efficiency in case of full wave rectifier is
100%
81.2%
66.6%
40.6%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
For a full wave bridge rectifier supplied with 50 Hz a.c., the lowest ripple frequency will be
50 Hz
100 Hz
200 Hz
400 Hz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
When an electron rises through a potential of 100 V it will acquired an energy of
100 eV
100 Joules
100 ergs
100 x 10-6 Newtons
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Which one of the following gain equations is correct for a MOSFET common-source amplifier?
(gm is mutual conductance, and RD is load resistance at the drain)
AV = gm/(1 - RD)
AV = gm/RD
AV = gm/(1 + RD)
AV = RD/gm
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
If 1 kVA transformer is used for all of the following rectifiers, the d.c. power availability will be least in case of
half wave rectifier
full wave rectifier
bridge rectifier
three phase full wave rectifier
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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