Plot a graph showing variation of induced e.m.f. with the rate of change of current flowing through a coil.
OR
A series combination of an inductor (L), capacitor (C) and a resistor (R) is connected across an a.c. source of emf of peak value ${\mathit{E}}_0$ and angular frequency $\left(\mathit{\omega }\right)$. Plot a graph to show variation of impedance of the circuit with angular frequency $\left(\mathit{\omega }\right)$.