A combination of elements is enclosed in a black box an the voltage and currents are measured across this black box. The expression for applied voltage, and the current flowing in it is `V = V_(0) sin omega t`,
`i = 2 sqrt(2) sin (omega + pi//4)` where `omega = 100 pi "rad"//"sec"` Then the wrong statement is

Options

A. The must be a capacitor is the black box
B. Power factor of circuit = 0.707
C. There must be a resistor in the box
D. There must be an inductor in the box

Answer

D

Explanation

Since current leads voltage by `45^(@)`, there mustbe a resistor and a capacitor. We can say nothing about inductor surely. It may or may not be present.