An AC source of 200V (rms), 50Hz is applied to a series combination of a resistor and an inductor (coil resistance negligible). The circuit draws 4.0A (rms) and a wattmeter records 480W. Determine the inductance of the coil.
a) 0.25H
b) 0.06H
c) 0.13H
d) 0.10H