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An iron rod becomes magnetic when_________

A) positive ions accumulate at one end and negative ions at the other end.
B) its atoms are aligned having plus charges on one side and negative charges on the other.
C) the net spins of its electrons are in the same direction.
D) its electrons stop moving and point in the same direction.
E) none of these

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abiolaraymond1995

Answer:

C

Explanation:

A magnetic material is one that can be attracted by a magnet when it is brought near it.

when the net spins of electrons of a metal are in opposite direction their magnetic momentum is cancelled out and it makes it a non-magnetic material. Iron however contains electrons whose spin are in the same direction. This makes iron a magnetic material

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