What is an electromagnet?

A magnet created by electric current

What do you need to make an electromagnet?

Wires, a power source, and a metal core

What happens when you turn off the electric current in an electromagnet?

It loses its magnetic properties

What effect does increasing the number of wire coils around the core have on an electromagnet?

It increases the strength of the magnet

It decreases the strength of the magnet

What is one common use for electromagnets?

In junkyard cranes to lift cars

In regular refrigerator magnets

What happens to the magnetic field of an electromagnet if you increase the electric current?

The magnetic field becomes stronger

The magnetic field stays the same

What is the main principle behind how an electromagnet works?

Metal shapes determine magnetism

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