In the circuit given below the value of resistance Req is _____________(a) 10 Ω(b) 11.86 Ω(c) 11.18 Ω(d) 25 ΩI got this question in an interview for internship.This key question is from Advanced Problems on Two Port Network in section Two-Port Networks of Network Theory

In the circuit given below the value of resistance Req is ____________

1.	In the circuit given below the value of resistance Req is _____________(a) 10 Ω(b) 11.86 Ω(c) 11.18 Ω(d) 25 ΩI got this question in an interview for internship.This key question is from Advanced Problems on Two Port Network in section Two-Port Networks of Network Theory
Answer» The correct OPTION is (c) 11.18 Ω To EXPLAIN I WOULD say: The circuit is as shown in figure below. Req = 5 + \(\frac{10(R_{EQ}+5)}{10 + 5 + R_{eq}}\) Or, \(R_{eq}^2\) + 15Req = 5Req + 75 + 10Req + 50 Or, \(R_{eq} = \sqrt{125}\) = 11.18 Ω.

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