Physics, 19.09.2019 21:00 pinklavalamp

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. only a bar...

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