Explanation
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Solenoid: A solenoid is a coil comprising numerous circular turns of insulated copper wire coiled on a cylindrical insulating
body (i.e., cardboard, etc.) so that its length exceeds its diameter.
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When current flows through the solenoid, the magnetic field line pattern closely matches that of a bar magnet with fixed polarity
, i.e. a North and South pole at each end, and it develops directive and attracting qualities similar to that of a bar magnet.
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As a result, the current-carrying solenoid acts like a bar magnet.
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Current-carrying solenoid is used to create a transient magnet known as an electromagnet, as well as a permanent magnet.
Final Answer
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A solenoid is a coil comprising numerous circular turns of insulated copper wire coiled on a cylindrical insulating body
(i.e., cardboard, etc.) so that its length exceeds its diameter.
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An electromagnet is a current-carrying solenoid.
