What does an inductor store when an electric current flows through it?

• A. Electrical energy
• B. Kinetic energy
• C. Pneumatic energy
• D. Thermal energy

Answer: (A)

An inductor stores electrical energy when an electric current flows through it. This occurs due to the inductor's property called inductance, which opposes any change in current. When current passes through the inductor, a magnetic field is generated around it. The energy is stored in this magnetic field as long as the current is flowing.

The electrical energy stored in the magnetic field can be released back into the circuit when the current decreases or is interrupted, showcasing the reactive nature of inductors in circuits. This ability to store energy in a magnetic form is a fundamental principle in many applications, including transformers and energy storage systems. Understanding this concept is crucial in electrical engineering and circuit design, as it directly impacts how inductors interact with other components in a circuit.