Working Principle - Faraday’s laws of electromagnetic induction
An electric current through the coil creates a magnetic field. The magnetic field exerts a force on the plunger. As a result, the plunger is pulled toward the center of the coil. If the current to the copper coil is controlled, we can use this motion of plunger to open or close solenoid valves or to impart rotary motion to any mechanism. Solenoid is the generic term for a coil of wire used as an electromagnet. It also refers to any device that converts electrical energy to mechanical energy using a solenoid.
This DIY kit depicts the principle stated above.
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