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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 9
36.
In a medium if ε, μ and σ are constant throughout the medium, then it is known as
perfect vacuum
distributed medium
homogeneous medium
dielectric medium
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
The directivity of 20 turn helix having a = 12° circumference equal to one wavelength, will be
1.8 dB
6 dB
12 dB
18 dB
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
The velocity factor of a transmission line
mainly depends on the skin effect
is always higher for a solid dielectric than for air
mainly depends on the dielectric constant of the material used
increases the velocity along the transmission line
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
For TM waves in a parallel plate waveguide, the minimum attenuation arising from imperfect conductors would occur at a freq. of (fc is the cut off frequency)
3 fc
3 fc
2 fc
2 fc
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
__________ acts as a depolarizer in a dry cell.
ammonium chloride
carbon powder
manganese dioxide
zinc chloride
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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