Question

When the rate of change of current through the coil is unity, then the induced emf is equal to

• A. Number of turns in the coil
• B. Total flux linked with the coil
• C. Coefficient of self-induction
• D. Unity

Answer 1

The correct option is C

Coefficient of self-induction

The emf in a coil is given $e=-L\left(\frac{dl}{dt}\right)$ where L is the coefficient of self-induction. When the rate of change of current $\left(\frac{dl}{dt}\right)$ = 1; ie .e, = L the coefficient of self-induction.