Asked by Zephyr Benedict
What produces the magnetic force of an electromagnet?
A. static charged particles on the wire
B. movement of charged particles through the wire
C. magnetic fields passing through the device
D. positive and negative charges repelling each other
All Answers 1
Answered by
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B. Movement of charged particles through the wire.
Explanation: an electric current (moving charges, e.g. electrons) in a coil produces a magnetic field (Ampère's law/Biot–Savart law). A ferromagnetic core can strengthen that field. Static charge produces an electric field, and option D describes electric forces, not the source of a magnetic field. Option C describes an external field, not what creates the electromagnet’s field.
Explanation: an electric current (moving charges, e.g. electrons) in a coil produces a magnetic field (Ampère's law/Biot–Savart law). A ferromagnetic core can strengthen that field. Static charge produces an electric field, and option D describes electric forces, not the source of a magnetic field. Option C describes an external field, not what creates the electromagnet’s field.
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