An AC source rated 220 V, 50 Hz is connected to a pure resistor. The time taken by the current to change from its maximum value to the RMS value is:

The peak value of an alternating current is 5 A and frequency is 60 Hz. How long will the current, starting from zero, take to reach the peak value?

An AC circuit contains a resistance of 1 kΩ, a capacitor of 0.1 μF, and an inductor of 1 mH connected in series. The resonance frequency of the circuit is approximately: