The voltage wave given by v = 4 cos ωt produces a current wave i = 1.5 cos ωt - 2.598 sin ωt in a circuit. The current wave:

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: