Question

The current $\left(I\right)$ in the inductance is varying with time ($t$) according to the plot shown in the figure.


Which one of the following is the correct variation of voltage with time in the coil?

Answer 1

Given: Current vs time graph,

as we know that,
$\text{emf}=-L\frac{dI}{dt}$
$\text{emf}\propto \frac{dI}{dt}$
or $\therefore \text{emf}\propto \text{slope of}I-t\text{graph}$

Hence, option $\left(\text{b}\right)$ is the correct representation of the voltage time graph.