Exercise: Electromagnetic Field Theory

Questions for: Electromagnetic Field Theory

In a carbon-zinc cell the function of the depolarizer is that
A:
it synthesizes the decomposed electrolyte
B:
it converts the produced hydrogen into water
C:
it absorbs the oxygen produced in the cell
D:
it prevents the fast chemical action on the zinc container
Answer: B
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Microwave signals follow the curvature of the earth and the phenomenon is known as
A:
tropospheric scatter
B:
duct propagation
C:
Faraday effect
D:
none of the above
Answer: B
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In waveguide Degenerate modes are
A:
two mode having same cut off frequency
B:
two mode having same power
C:
two mode having same phase velocity
D:
it is a hypothetical mode
Answer: A
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An antenna is considered to be in free space where its height above the ground is
A:
λ
B:
2λ
C:
less than 3λ
D:
more than 5λ
Answer: D
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When a line of any odd multiple of a quarter wavelength is short-circuited it represents
A:
unit impedance
B:
infinite impedance
C:
zero impedance
D:
none of the above
Answer: B
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