Electronics and Communication Engineering - Electromagnetic Field Theory - Discussion

Discussion Forum : Electromagnetic Field Theory - Section 3 (Q.No. 4)
4.
In a line VSWR of a load is 6 dB. The reflection coefficient will be
0.033
0.33
0.66
3.3
Answer: Option
Explanation:

VSWR = 100.6

Discussion:
1 comments Page 1 of 1.

Amod kumar Jha said:   7 years ago
It should be 0.33.

If voltage or magnitude express in db then the farmula is 20log(v).
And anything related to power is only written in 10log(p), it is the actual meaning of decimal means 10.
We can remember it by viewing p=v^2/r.
Since square term come in the farmula so that 2 goes into multiplication with 10 equal 20, while expressing in log.

I hope now it clear to everyone.
(1)

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