Which statement about an electromagnet is true
a) it doesn’t function without a source of current.
b) the core is made from a non magnetic material
c) it uses moving magnets to create an electric field
d) it creates a permanent and strong magnetic field

Explanation / Definition:

For this question I don't think we'll have to go deeply into the incorrect options to find out why they're wrong. We'll just get a simple definition of electromagnetism and find what the correct option is:

- Electromagnetism: the interaction of electricity (in the form of currents) with magnets (generation of magnetic fields).

Explanation 2 / Answer explained:

Given the definition above, we can deduce that if there is not current, electromagnetism will not be possible, since there wont be an interaction of electricity and magnetic fields.

A.

Hope it helped,

BiologiaMagister

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explanation:

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