Question: A current-carrying wire has a magnetic field around it because a. a moving charge produces a magnetic field of its own. b. the current aligns

A current-carrying wire has a magnetic field around it because

a. a moving charge produces a magnetic field of its own.

b. the current aligns the magnetic fields in the metal of the wire.

c. the metal was magnetic before the current was established and the current enhanced the magnetic effect.

d. None of the above is correct.

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