Find the value of induced emf in a 20 H inductor through which the current is changing from 20 A to 10 A in 0.33 seconds.

Explanation

To find the value of the induced emf in a 20 H inductor when the current changes from 20 A to 10 A in 0.33 seconds, we can use the formula for induced emf (E) in an inductor, which is given by:

\[ E = -L \frac{\Delta I}{\Delta t} \]

Where:
- \( E \) is the induced emf,
- \( L \) is the inductance (in henries),
- \( \Delta I \) is the change in current (in amperes),
...