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In the circuit shown below, find the Z-parameter Z22.(a) 3(b) 2(c) 4(d) 1I got this question at a job interview.Asked question is from Inter Connection of Two-Port Networks in chapter Two-Port Networks of Network Theory

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Right OPTION is (a) 3

Easiest explanation: The Z-parameter Z21 is V2/I2 |I1=0. This parameter is obtained by open circuiting port 1. So we GET V2 = (2 + 1)I2 => V2 = 3(I2) => V2/I2 = 3. On substituting Z21 = 3Ω.



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