Question

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


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

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

Given: Current vs time graph,

as we know that,
$\text{emf}=-\frac{LdI}{dt}$
$\text{emf}\propto \frac{dI}{dt}$
or $\therefore \text{emf}\propto \text{slope of}I-t\text{graph}$
Hence, option $\left(B\right)$ is the correct reperesentation of the voltage time graph.