Self inductance and work done derivations?
Answers
Explanation:
Self inductance is the ratio of induced electromotive force (EMF) across a coil to the rate of change of current through the coil. We denote self inductance or coefficient of with English letter L. Its unit is Henry (H).
Explanation:
Self induction is a phenomenon by which a changing electric current produces an induced emf across the coil itself.
Self Inductance
Self inductance is the ratio of induced electromotive force (EMF) across a coil to the rate of change of current through the coil. We denote self inductance or coefficient of with English letter L. Its unit is Henry (H).
Since, the induced emf (E) is proportional to the current changing rate, we can write,
But the actual equation is
Why there is Minus (-) sign?
According to Lenz’s Law, the induced emf opposes the direction of the rate of change of current. So their value is same but sign differs.