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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 13
6.
The capacitance between two spheres, whose separation is very much larger than their radii R, is given approximately as
2pε0R
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
If ωε is the displacement current factor and s is conduction current density factor then which of the following statements is incorrect?
For a lossless dielectric σ = 0
For an imperfect dielectric σ = 0
For a dielectric ωε >> σ
For a semiconductor ωε = σ
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
Parabolic and lens antenna used at
microwave frequency
medium frequency
low frequency
high frequency
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
Which of the following statement regarding waveguides is incorrect?
At waveguide can be coupled to a coaxial cable
At frequencies below the cut off value the wave progresses across the waveguide after total reflections
Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves
Waveguides can handle large power at UHF and microwaves
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
The potential that appears at a point in space due to the current which caused it is called potential
accelerating
retardation
oscillating
lagging the current
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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