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The hybrid parameter h21 is called?

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The hybrid parameter h21 is called?

(a) open circuit output admittance

(b) open circuit reverse voltage gain

(c) short circuit forward current gain

(d) short circuit input impedance

This question was addressed to me during a job interview.

The doubt is from Transmission(ABCD) Parameters in section Two-Port Networks of Network Theory

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The correct answer is (c) short circuit forward current gain

Easy explanation: h21=I2/I1 |V2=0. So the hybrid parameter h21 is called short circuit forward current gain.

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