Physics

Problem

A resistor of

5\,\Omega

, a capacitor of

4\,\mu\text{F}

and an unknown inductor are connected in series to a

12\,\text{V}

(r.m.s.) AC source. The r.m.s. current in the circuit is

1.2\,\text{A}

at both

100\,\text{Hz}

and

900\,\text{Hz}

. Calculate the inductance of the coil.