Question

How is an electromagnet different from a bar magnet?

Question 3 options:

a.Only a bar magnet has a magnetic field.


b.Only an electromagnet attracts materials made of iron.


c.An electromagnet is temporary and is magnetic when a current flows through a wire wrapped around the core.


d.A bar magnet is a temporary and is only magnetic when a current flows through a wire wrapped around the core.

Answer 1

I believe the correct answer would be that an electromagnet is temporary and is magnetic when a current flows through a wire wrapped around the core. An electromagnet is made from coils of wires that is magnetized when current is passed through the wires. Bar magnets are permanent magnets.