Solenoid - GCSE Physics Definition
Reviewed by: Caroline Carroll
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A solenoid is a long coil of wire, often wound in a helical shape, through which an electric current can flow. When electricity passes through the solenoid, it creates a magnetic field around it, which is similar to the magnetic field of a bar magnet. Within the solenoid, the magnetic field is very strong as each coil creates its own magnetic field, which add up to form an even stronger one. Solenoids are used in many devices to convert electrical energy into mechanical energy, acting as an electromagnet. For example, they can be found in doorbells, car starter motors, and electric locks.
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