In two-port networks the parameter g21 is called _________(a) Short circuit input impedance(b) Short circuit current ratio(c) Open circuitvoltage ratio(d) Open circuit input admittanceI had been asked this question in an interview.This intriguing question comes from Inverse Hybrid (g) Parameter topic in portion Two-Port Networks of Network Theory

In two-port networks the parameter g21 is called _________(a) Short ci

1.	In two-port networks the parameter g21 is called _________(a) Short circuit input impedance(b) Short circuit current ratio(c) Open circuitvoltage ratio(d) Open circuit input admittanceI had been asked this question in an interview.This intriguing question comes from Inverse Hybrid (g) Parameter topic in portion Two-Port Networks of Network Theory
Answer» Right option is (c) Open circuitvoltage ratio For explanation I would say: We know that, g21 = \(\frac{V_2}{V_1}\), when I2 = 0. Since the SECOND output TERMINAL is short circuited when the ratio of the TWO VOLTAGES is measured, therefore the parameter g21 is called as Open circuit voltage ratio.

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