Question

The unit of self-inductance of a coil is?

Answer 1

1. The tendency of a coil to resist changes in current in itself is known as self-inductance.
2. The coefficient of self-inductance is defined as the ratio of back emf to the rate of change of current in the coil.
3. The self-inductance of a coil, $L=\frac{e}{{\displaystyle \frac{di}{dt}}}$(where, $e$ = back emf, $\frac{di}{dt}$ = rate of change of current) $=\frac{Vs}{A}$(where $volt\left(V\right)$ = SI unit of magnetic flux and $ampere\left(A\right)$ = SI unit of current, $second\left(s\right)$ = unit of time)
4. $\frac{Vs}{A}=H$(where, $henry\left(H\right)$ = SI unit of self-inductance)

Hence, the unit of self-inductance of a coil is $henry\left(H\right)$