For the circuit given below, the value of the hybrid parameter h21 is ___________(a) 0.6 Ω(b) 0.5 Ω(c) 0.3 Ω(d) 0.2 ΩI got this question during an interview.This interesting question is from Hybrid (h) Parameter in section Two-Port Networks of Network Theory

For the circuit given below, the value of the hybrid parameter h21 is

1.	For the circuit given below, the value of the hybrid parameter h21 is ___________(a) 0.6 Ω(b) 0.5 Ω(c) 0.3 Ω(d) 0.2 ΩI got this question during an interview.This interesting question is from Hybrid (h) Parameter in section Two-Port Networks of Network Theory
Answer» Correct option is (b) 0.5 Ω Best EXPLANATION: Hybrid parameter h21 is given by, h21 = \(\frac{I_2}{I_1}\), when V2=0. Therefore SHORT CIRCUITING the terminal Y-Y’, and applying Kirchhoff’s LAW, we get, -10 I2 – (I2 – I1)10 = 0 Or, -I2 = I2 – I1 Or, -2I2 = -I1 ∴\(\frac{I_2}{I_1} = \frac{1}{2}\) Hence h21 = 0.5 Ω.

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