Question

how is an electromagnet prepared?

Answer 1

Some of the copper wire needs to be exposed so that the battery can make a good electrical connection. Use a pair of wire strippers to remove a few centimeters of insulation from each end of the wire. Neatly wrap the wire around the nail. The more wire you wrap around the nail, the stronger your electromagnet will be.

Answer 2

first we take a iron rod and gave quarrel shape and be passing electric .