Question

If ZS=RS+jXS, ZL=RL, then condition for maximum power to be transferred is?

(a) RL=|ZS|

(b) RL=ZS

(c) RL=-|ZS|

(d) RL=-ZS

This question was addressed to me in exam.

My question is based upon Maximum Power Transfer Theorem topic in division Steady State AC Analysis of Network Theory

Answer 1

Right choice is (a) RL=|ZS|

To explain I would say: If ZS=RS+jXS, ZL=RL, then condition for maximum power to be transferred is RL=|ZS| that is maximum power is transferred when the load resistance is equal to the magnitude of the source impedance.