In two-port networks the parameter h21 is called _________(a) Short circuit input impedance(b) Short circuit current gain(c) Open circuit reverse voltage gain(d) Open circuit output admittanceI have been asked this question in unit test.My enquiry is from Hybrid (h) Parameter topic in chapter Two-Port Networks of Network Theory

In two-port networks the parameter h21 is called _________(a) Short ci

1.	In two-port networks the parameter h21 is called _________(a) Short circuit input impedance(b) Short circuit current gain(c) Open circuit reverse voltage gain(d) Open circuit output admittanceI have been asked this question in unit test.My enquiry is from Hybrid (h) Parameter topic in chapter Two-Port Networks of Network Theory
Answer» The correct choice is (B) Short circuit current gain Best explanation: We know that, h21 = \(\FRAC{I_2}{I_1}\), when V2 = 0. Since the second output terminal is short circuited when the RATIO of the TWO currents is measured, therefore the parameter h21 is called Short circuit current gain.

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