solenoid principle and working
Answers
An electrical current through the coil creates a magnetic field. The magnetic field exerts a force on the plunger. As a result the plunger is pulled towards the centre of the coil so that the orifice opens. This is the basic principal that is used to open and close solenoid valves.
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Solenoid is the generic term for a coil of wire used as an electromagnet. It also refers to any device that converts electrical energy into mechanical energy using a solenoid. The device creates a magnetic field from electric current and uses the magnetic field to creat linear motion.
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SOLENOID:
solenoid is a long coil of wire closely wound in the form of helix and has a steel core.
Principle:
It converts electrical energy into mechanical energy.
Working:
1.when the electric field is passed to the solenoid,the magnetic field is produced.
2.This magnetic field is due to the superposition of magnetic fields of each turn of the solenoid.
3.Inside the solenoid the magnetic field is nearly uniform and parallel to it's axis . whereas outside the solenoid the field is negligibly small or zero.
4.Based on the direction of the current, one end of the solenoid act as a north pole and the other end as south pole.
5.The solenoid is assumed to be long which means that the length of the solenoid is greater than it's diameter.