A coil of unknown resistance R and inductance L is connected to a 120 V (r.m.s.), 60 Hz mains supply. The r.m.s. current in the circuit is 2.5 A and the average power consumed is found to be 180 W.
a. (i) Calculate the impedance of the circuit.
b. (ii) Determine the power factor of the circuit.
c. (iii) Find the resistance R of the coil.
d. (iv) Hence obtain the inductance L of the coil.