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Electromagnetic Field Theory - Engineering

Q1:

If short-circuited and open circuited impedances are 5 ohms and 20 ohms, then characteristic impedance is

A 1 ohms

B 10 ohms

C 25 ohms

D 100 ohms

ANS:B - 10 ohms

=> sqrt(5 * 20) = 10.

So answer = 10 ohms.