Can a.c. source be connected to a circuit and yet deliver no power to it ? If so, under what circumstance ?

When an a.c source is connected across a resistor

An a.c. source is connected to two circuit as shown in fig. 14.10. Obtain the current through the resistance R at resonance in both the circuits.

At resonance in an a.c. circuit, what is the value of power factor ?

There is an AC source of rms voltage 200 V and frequency 50 Hz. When the source is connected to a circuit then rms current flowing in the circuit is 15 A. Average power delivered by the source

An ac source is connected to a resistive circuits. Which of the following statements are false ?

A series LCR circuit with L= 0.12H, C=480 nF, and R=23 Omega is connected to a 230-V variable frequency supply. (a) What is the source frequency for which current amplitude is maximum? Find this maximum value. (b) What is the source frequency for which average power absorbed by the circuit is maximum? Obtain the value of maximum power. (c ) For which frequencies of the source is the power transferred to the circuit half the power at resonant frequency? (d) What is the Q-factor of the 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.