Energy stored in an inductor

Definition

Energy stored in an inductor is the potential energy due to the magnetic field created by current flowing through it. This energy can be expressed mathematically as $E = \frac{1}{2}LI^2$, where $L$ is inductance and $I$ is current.

5 Must Know Facts For Your Next Test

1. The formula for energy stored in an inductor is $E = \frac{1}{2}LI^2$.
2. Inductors store energy in their magnetic field as long as current flows through them.
3. The unit of inductance, henry (H), plays a crucial role in determining the amount of energy stored.
4. Energy storage capability of an inductor depends on both its inductance and the square of the current passing through it.
5. In AC circuits, inductors can temporarily store and release energy, causing phase shifts between voltage and current.

Review Questions

• What is the formula for calculating the energy stored in an inductor?
• How does the inductance value affect the energy storage capability of an inductor?
• Why do inductors cause phase shifts between voltage and current in AC circuits?

Related terms

Inductance:

A property of an electrical conductor which opposes a change in current, measured in henries (H).

Magnetic Field:

A field produced by electric currents or changing electric fields, fundamental to how inductors store energy.

AC Circuit: An electrical circuit powered by alternating current (AC), where components like inductors play a significant role.