Question -
Following figure shows an ac generator connected to a "block box" through a pair of terminals. The box contains possible R, L, C or their combination, whose elements and arrangements are not known to us. Measurements outside the box reveals that e = 75 sin (sin ωt) volt, i = 1.5 sin (ωt+45∘) amp then, the wrong statement is
Options:
A .  There must be a capacitor in the box
B .  There must be no inductor in the box
C .  There must be a resistance in the box
D .  The power factor is 0.707
Answer: Option B : B Since voltage is lagging behind the current, so there must be no inductor in the box.
Submit Your Solution hear: