1.

In the circuit given below, the value of the Inverse hybrid parameter g21 is _________(a) 10 Ω(b) 0.5 Ω(c) 5 Ω(d) 2.5 ΩI have been asked this question in exam.The origin of the question is Inverse Hybrid (g) Parameter topic in portion Two-Port Networks of Network Theory

Answer»

Right choice is (b) 0.5 Ω

Best explanation: INVERSE Hybrid parameter G21 is given by, g21 = \(\frac{V_2}{V_1}\), when I2 = 0.

Therefore short circuiting the TERMINAL Y-Y’, and APPLYING KIRCHHOFF’s law, we get,

V1 = I1 (5 + 5)

V2 = I1 5

∴ \(\frac{V_2}{V_1}= \frac{I_1 5}{I_1 10}\) = 0.5

 Hence g21 = 0.5 Ω.



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