Physics, 31.01.2020 01:48 anikabarnhart

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.

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How is an electromagnet different from a bar magnet?

question 3 options:

a....