What is the unit of self-inductance?
Self-inductance is the property of a coil that causes it to oppose any change in the current flowing through it by producing a self-induced electromotive force (EMF).
Self-inductance \( L \) is defined as the ratio of the induced EMF \( E \) to the rate of change of current \( \frac{di}{dt} \).
\[ L = \frac{E}{\frac{di}{dt}} \]
\[ E = -L \frac{di}{dt} \]
From the formula:
\[ L = \frac{\text{Volt}}{\text{Ampere/second}} = \frac{\text{Volt} \cdot \text{second}}{\text{Ampere}} \]
This derived unit is known as the Henry (H).