Magnetic Energy:
Magnetic energy refers to the energy stored in a magnetic field. It is a form of potential energy that is associated with the magnetic properties of materials and the interaction between magnetic fields and electric currents. When a magnetic field is created or changed, energy is stored in the form of magnetic potential energy.

Inductor:
An inductor is a passive electronic component that stores energy in the form of a magnetic field. It consists of a coil of wire wound around a core material, usually made of ferromagnetic material such as iron or ferrite. When an electric current flows through the coil, a magnetic field is generated around it. This magnetic field stores energy in the inductor.

Why Magnetic Energy is Stored in an Inductor:
The storage of magnetic energy in an inductor can be explained by Faraday's law of electromagnetic induction. According to this law, when the current flowing through an inductor changes, it induces a voltage across the inductor proportional to the rate of change of current. This induced voltage opposes the change in current, resulting in the storage of energy in the magnetic field of the inductor.

Explanation:
- When a current flows through the coil of an inductor, a magnetic field is created around it. The strength of the magnetic field is directly proportional to the current flowing through the coil.
- As the current increases or decreases, the magnetic field also changes.
- According to Faraday's law, this change in magnetic field induces a voltage across the inductor. The induced voltage is given by the equation V = -L*(di/dt), where V is the induced voltage, L is the inductance of the coil, and (di/dt) is the rate of change of current.
- The negative sign indicates that the induced voltage opposes the change in current. This is known as Lenz's law, which states that the induced current will always oppose the change in magnetic field.
- The induced voltage causes the inductor to resist the change in current flow. This resistance results in the storage of energy in the magnetic field of the inductor.
- The energy stored in an inductor can be calculated using the equation E = (1/2)*L*I^2, where E is the magnetic energy, L is the inductance, and I is the current flowing through the inductor.
- The magnetic energy stored in an inductor can be released back into the circuit when the current flowing through the inductor decreases or stops. This energy can be used to power other components or devices in the circuit.

In conclusion, magnetic energy is stored in an inductor due to the interaction between the changing current flowing through the coil and the magnetic field generated by the coil. This energy storage is a result of Faraday's law of electromagnetic induction and Lenz's law.