Fig. show three alternating circuits with equal currents. If frequency of alt. e.m.f be increased, what will be the effect on currents in the three cases? Explain.

Explanation

(i) In circuit (a), there will be no effect on the current flowing. This is because, R is not affected by frequency.
(ii) In circuit (b), current will decrease as inductive reactance `X_(L) = omega L = 2 pi v L` will increase with increasing frequency.
(iii) In circuit (c ), current will increases as
capacitative reactance `X_(C ) = (1)/(omega C) = (1)/(2 pi v C)`
will decrease on increasing the frequency.