A coil of unknown resistance and inductance is connected to a 120 V (r.m.s.), 60 Hz…
PHYSICS · Multi-part · CBSE · Physics · Alternating Current · Alternating Current
Problem
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.
(i) Calculate the impedance of the circuit.
(ii) Determine the power factor of the circuit.
(iii) Find the resistance R of the coil.
(iv) Hence obtain the inductance L of the coil.