A coil draws a current of 1A and a power of 100W from an ac source of 110 V and 50 Hz. Find the resistance and the inductance of the coil?

Find the maximum current through an inductance of 2H connected to an ac source of 150V, 50 Hz.

A resistance of 50 Omega is connected to an ac source of 220 V, 50 Hz. Find (i) the rms current (ii) The maximum instantaneous current in the resistor and (iii) the time taken by the current to change from its maximum value to the rms value.