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In the circuit shown below, find the value of load impedance for which source delivers maximum power.(a) 15-j20(b) 15+j20(c) 20-j15(d) 20+j15The question was posed to me during a job interview.The query is from Maximum Power Transfer Theorem in chapter Useful Theorems in Circuit Analysis of Network Theory

Answer»

The correct CHOICE is (a) 15-j20

To EXPLAIN: The maximum power transfer occurs when the load IMPEDANCE is equal to the complex conjugate of SOURCE impedance ZS. ZL = ZS^* = (15-j20)Ω.



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