Electronics and Communication Engineering - Electromagnetic Field Theory - Discussion

6. 

The input impedance of short-circuited line of length l where λ/4 < l < λ/2, is

[A]. resistive
[B]. inductive
[C]. capacitive
[D]. none of the above

Answer: Option C

Explanation:

l < λ/4, ZL = 0

, if Zd comes +j kZC then inductive,

If Zd comes -j kZC then capacitive.

for 0 ≤ l ≤ 1/4, λ ≤ l ≤ 3λ/4 will be inductive.


Kameshwari said: (Apr 26, 2017)  
I didn't get this. Please, anyone help me.

Dev said: (May 15, 2017)  
b(beta) = 2*π/λ.
if d = λ/4 implies Zd = 0.
Calculate like this you will find the answer.

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