JEE Main 2018 Physics question

In an a.c. circuit, the instantaneous e.m.f. and current are given by

e = 100 30t, i = 20 (30t - )

In one cycle of a.c., the average power consumed by the circuit and the wattless current are, respectively :

• (A)50, 10
• (B), 10Correct
• (C), 0
• (D)50, 0