Question

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 admittance

I 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 1

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.