If the output impedance of a certain circuit is 100 Ω - j20 Ω, what value of load impedance will result in maximum power transfer to the load?
A) 20 Ω - j100 Ω
B) 100 Ω + j20 Ω
C) 20 Ω+ j100 Ω
D) 100 Ω- j20 Ω

Question

Quizplus · Accepted Answer

For maximum power transfer to the load in an AC circuit, the load impedance must be the complex conjugate of the source (or output) impedance. The given output impedance is 100 Ω - j20 Ω, so the complex conjugate is 100 Ω + j20 Ω.

If the Output Impedance of a Certain Circuit Is 100