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Find the driving point impedance Z11 (S) in the circuit shown below.(a) 2(s+2)(b) (s+2)(c) 2(s+1)(d) (s+1)I have been asked this question during an internship interview.The doubt is from Network Function for the One-Port and Two-Port in portion S-Domain Analysis of Network Theory

Answer»

Correct option is (c) 2(s+1)

Best EXPLANATION: The driving point IMPEDANCE Z11 (S) is Z11 (S)=V1(S)/I1(S). V1 (S) = 2 I1 (S) + 2 sI1 (S) => V1(S) = (2+2s)I1(S) => V1(S)/I1(S) = 2(s+1). On substituting Z11 (S) = 2(S+1).



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