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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 14
46.
Consider the following statements
  1. An iron cored choke is a nonlinear device.
  2. A carbon resistor kept in a sunlight is a time - invariant and passive device.
  3. A dry cell is a time - varying and active device.
  4. An air capacitor is a time - invariant and passive device
Of these statements
1, 2, 3 and 4 are correct
1, 2 and 3 are correct
1, 2 and 4 are correct
2 and 4 are correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
If 10 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 will be
20 V
14.14 V
10 V
7.8 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
In energy band diagram of p type semiconductor the acceptor energy level is
in valence band
in conduction band
slightly above valence band
slightly below conduction band
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
Given a power supply filter circuit, what measurements must be made of determine percentage regulation
current through and voltage across the capacitor
d.c. load voltage and r.m.s. load voltage
current through load and voltage across load resistance
number of turns and gauge of secondary winding of transformer
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
When the gate terminal of MOSFET is positive, it is said to operate in
depletion mode
conduction mode
enhancement mode
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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