Which element stores energy in a magnetic field?

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Multiple Choice

Which element stores energy in a magnetic field?

Explanation:
Inductors store energy in a magnetic field. When current flows through a coil, it creates a magnetic field around the winding, and the energy tied to that field is E = 1/2 L I^2, where L is the inductance and I is the current. That magnetic-field energy is what characterizes an inductor’s storage capability, not the other options. Capacitance stores energy in an electric field between plates (E = 1/2 C V^2). Frequency describes how often a cycle occurs and isn’t itself an energy storage element. Current is the measure of flow that generates the magnetic field but isn’t the storage mechanism by itself.

Inductors store energy in a magnetic field. When current flows through a coil, it creates a magnetic field around the winding, and the energy tied to that field is E = 1/2 L I^2, where L is the inductance and I is the current. That magnetic-field energy is what characterizes an inductor’s storage capability, not the other options.

Capacitance stores energy in an electric field between plates (E = 1/2 C V^2). Frequency describes how often a cycle occurs and isn’t itself an energy storage element. Current is the measure of flow that generates the magnetic field but isn’t the storage mechanism by itself.

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