Application of magnetic field of current carrying solenoid.
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A coil of many circular turns of insulated copper wire wrapped\xa0closely in the shape of a cylinder is called a solenoid.\xa0The magnetic field of a\xa0solenoid carrying a current is similar to that of a bar magnet.\xa0A strong magnetic field produced inside a solenoid can be\xa0used to magnetise a piece of magnetic material\xa0when placed inside the coil. The magnet so formed with the help of a solenoid and a core of\xa0soft iron\xa0is\xa0called an ELECTROMAGNET.\tSolenoids\xa0are most commonly used as electromagnets.\tThey can be used to slow the flow of electricity in a circuit, making them an example of an inductor (an impedance device).\tSolenoid\xa0valves are a variety of electromechanical valves that are controlled by an electric current triggered by a\xa0solenoid.\tA starter\xa0solenoid is used in automobiles to start the engine.\xa0