Question

why naked wire cannot use in electromagnet
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Answer 1

Answer:

Explanation:

The wire in the windings needs to be insulated. Electricity takes the shortest path from one place to another. If the wire is bare, then adjacent turns are touching. The result is the current flows through the shortest path between the leads of the electromagnet, never flowing through a single turn of the coil.

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Answer 2

Answer: It will short between the windings; the current rather than passing around and around and around the core will just pass across the surface and create no magnetic field (which is proportional to the number of turns it takes around the core).

Explanation: If naked wire is used then the iron rod also acts as a conductor and short circuit takes place instead of showing magnetic effect of electricity to the molecules of the rod. Hence, naked wire is not used while making electromagnet.