question_answer 27)

  An alternating current generator has an internal resistance and an internal reactance . It is used to supply power to a passive load consisting of a resistance and a reactance. For maximum power to be delivered from the generator to the load, the value of is equal to (a) zero                                (b)     (c)                                (d)

Answer:

  (c)For delivering maximum power from the generator to the passive load, total reactance must vanish, i.e., . Choice (c) is correct.