Question

define a solenoid how is it different from a coil

Answer 1

A solenoid is a coil wound into a tightly packed helix. ... A solenoidis essentially a device used to create magnetic fields by passage of current through it. Its shape is somewhat like a spiral spring,like a spiral loop of wire. A solenoid may also be regarded as a circularcoil, albeit with a very large number of turns.
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