Science Help needed!! please

Question

why do you think the wire of an electromagnet should be insulated, considering that they are mostly powered by weak currents.

i just dont get it,

answers please?

thanks.

Answer 1

Absent insulation, the current will take a shortcut from turn to turn rather than running the long way around the windings.  A plastic or enamel insulation is used to prevent this.

Answer 2

I quote from this website:  http://www.school-for-champions.com/scie...

Insulated wire

Note that the wire must be an insulated wire. A bare wire would cause an electrical short and the current would then run through the nail or metal core. In some electromagnets, like in an electric motor, the wire will look like bare copper, but it is insulated with a thin coating of a clear material.

Also, if the wire is thin, it may get warm from the resistance to the electricity passing through it.