एक शुद्ध ज्यावक्रीय (sinusoidal) प्रत्यावर्ती तरंग का रूप गुणांक (form factor) कितना होता है?

An alternating voltage source of variable angular frequency ω and fixed amplitude V is connected in series with a capacitance C and an electric bulb of resistance R (zero inductance). When ω is increased, what happens to the brightness of the bulb?

An inductor of reactance 1 Ω and a resistor of 2 Ω are connected in series to the terminals of a 6 V (rms) AC source. The power dissipated in the circuit is: