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 t) volt, i = 1.5 sin ( t + 45^o) amp then, the wrong statement is

1. There must be a capacitor in the box    
2. There must be an inductor in the box    
3. There must be a resistance in the box    
4. The power factor is 0.707