Definition
A solenoid is a long coil of wire, typically wound in a cylindrical shape, that generates a magnetic field when an electric current passes through it. The magnetic field produced by a solenoid resembles that of a bar magnet, with distinct north and south poles. Solenoids are commonly used in various applications, including electromagnets, relays, and actuators.
- Illustrative Explanation: Imagine a tightly coiled spring. When you pass a current through the wire of the spring, it creates a magnetic field similar to how a bar magnet has a north and south pole. The solenoid acts like a magnet, attracting or repelling other magnetic materials.