Question

The current as a function of time through a $4.6\text{H}$ inductor is shown in the following graph. The induced emf during the time interval $t=5\text{ms}$ to $6\text{ms}$ will be -

• A. $20\text{kV}$
• B. $23\text{kV}$
• C. $26\text{kV}$
• D. $29\text{kV}$

Answer 1

The correct option is B $23\text{kV}$


We know that, induced emf,

$E=-L\frac{di}{dt}$

$\Rightarrow E=-4.6\times \left[\frac{0-5}{(6-5)\times {10}^{-3}}\right]=23\text{kV}$

Hence, option $\left(B\right)$ is the correct answer.