Electronics and Communication Engineering - Electromagnetic Field Theory

41.
When a coil consisting of single turn rotates at a uniform speed in a magnetic field, the induced e.m.f. is
changing
reversing
steady
alternating
Answer: Option
Explanation:
No answer description is available. Let's discuss.

42.
Short-circuited stubs are used, because open-circuited stubs are
liable to radiate
complex in nature
providing open-circuit environments
unable to provide work over large frequency range
Answer: Option
Explanation:
No answer description is available. Let's discuss.

43.
Directivity and beamwidth is related as
D ∝ B
D ∝ 1/B
D ∝ B
D ∝ B2
Answer: Option
Explanation:
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44.
An arrangement of several individual antennas to spaced and phased that their individual contributions combine in one preferred direction and cancel in all other directions, to get greater directive gain or directivity, is known as
directional radiation of antennas
antenna gain stability
array of antennas
none of the above
Answer: Option
Explanation:
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45.
The complex Poynting vector for electromagnetic wave.
Im(E x Hx)
Re(E x Hx)
(E x H)
E x H
Answer: Option
Explanation:
No answer description is available. Let's discuss.