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The open circuit impedance of the transmission line is given by(a) ZOC = j Zo tan βl(b) ZOC = – j Zo tan βl(c) ZOC = j Zo cot βl(d) ZOC = -j Zo cot βlI got this question during an internship interview.Question is taken from Transmission Lines topic in section Transmission Lines of Electromagnetic Theory

Answer»

The correct CHOICE is (d) ZOC = -j Zo cot βl

Easiest explanation: The open circuit in a transmission LINE refers to the load side open circuited. In this CASE, the load IMPEDANCE will be infinite. Thus the transmission line equation will be ZOC = -j Zo cot βl.



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