What is wattless current ? Show mathematically that an ideal inductor does not consume any power in an a.c. circuit.

Obtain anexpression for the average power of an a.c circuit .

STATEMENT-1: AC source is connected across a circuit. Power dissipated in circuit is P . The power is dissipated only across resistance. STATEMENT-2: Inductor and capacitor will not consume any power in AC circuit.

Prove that an ideal capacitor in an a.c. circuit does not dissipate power.

(a) Prove that the current flowing through an ideal inductor connected across a.c. source, lags the voltage in phase by pi/2 . (b) An inductor of self inductance 100 mH, and a bulb are connected in series with a.c. sources of rms voltage 10 V, 50 z. It is found that effective voltage of the circuit leads the current in phase by pi/4 . Calculate the inductance of the inductor used and average power dissipated in the circuit, if a current of 1 A flows in the circuit.

Power consumed in an AC circuit becomes zero if

The current, which does not contribute to the power consumed in an AC circuit is called

Under what conditions, power factor of an a.c. circuit is maximum ?

Calcualte energy stored in an inductor in an a.c. circuit. Show that average power consumed per cycle in an a.c. circuit containing pure indcutor is zero