Inductor Energy and Magnetic Fields

What is the energy stored in an inductor when no current flows through it?

• Zero

• Maximum

• Dependent on the inductor's inductance

• Dependent on the applied voltage

What is established through and around an inductor when current begins to flow through it?

• An electric field

• A magnetic field

• A gravitational field

• Sound waves

How does an inductor store energy?

• By generating heat through resistance.

• By building up an electric charge.

• By creating a magnetic field.

• By producing sound vibrations.

Which formula represents the energy (W) stored in an inductor, where L is the inductance and I is the current?

• W = L * I

• W = 1/2 * L * I^2

• W = L / I

• W = I^2 / L