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What is required for an electromagnet to produce a magnetic field that is
strong enough to be useful?
A. A coil of wire with current running through it
B. A magnetic metal core with wire wrapped around it
C. A permanent magnet
D. A magnetic metal core
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Respuesta :

Answer:

A. A coil of wire with current running through it

andichy

Answer:if you have different ans your may be a soleno with a current running though it.

Explanation:

Ape.x

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