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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 4
6.
If short-circuited and open circuited impedances are 5 ohms and 20 ohms, then characteristic impedance is
1 ohms
10 ohms
25 ohms
100 ohms
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
Electric lines of force do not cross each other because
the lines of force mutually repel each other
the lines of force emanate from a point charge
the tangent to the line of force gives the direction of E and if they cross two tangents for E which is not possible
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
A person with a receiver is 5 km away from the transmitter. What is the distance that this person must move further to detect at 3 dB decrease in signal strength?
942 m
2070 m
4978 m
5320 m
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
For free space propagation
γ = a + jβ
γ = jβ
γ = a
a = β = 0
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
SHF range is
30 - 300 MHz
300 - 3000 MHz
3000 - 30000 MHz
30000 - 300000 MHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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