Question

A constant current of $2\text{A}$ is passing through a solenoid of inductance $12\text{H}$. Then,

• A. Emf induced across solenoid 8 volt.
• B. Emf induced across solenoid 6 volt.
• C. Potential difference across solenoid is 0 volt.
• D. Potential difference across solenoid is 8 volt.

Answer 1

The correct option is C Potential difference across solenoid is 0 volt.

$\text{emf}=L\frac{di}{dt}=0$
(since $i=$ constant)