An average induced emf of 0.20 V appears in a coil when the current in it is changed from 5.0 A in one direction to 5.0 A in the opposite direction in 0.20 s. find the self inductance of the coil.

Explanation

To find the self-inductance of the coil, we can follow these steps:

### Step 1: Understand the relationship between induced emf, self-inductance, and current change
The formula that relates the induced emf (E), self-inductance (L), and the rate of change of current (di/dt) is given by:
\[ E = -L \frac{di}{dt} \]
Where:
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