If a rate change of current of `4As^(-1)` induces an emf of 20mV in a solenoid, what is the self inductance of the solenoid?

Explanation

To find the self-inductance of the solenoid, we can use the formula that relates the induced electromotive force (emf) to the self-inductance and the rate of change of current. The formula is given by:

\[ E = L \frac{di}{dt} \]

Where:
- \(E\) is the induced emf (in volts),
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