The wire will become warmer. The wire will lose some of its mass. The wire will form an electric field. The wire will develop a new crystal structure.
I gave my students this multiple choice question: Which change will occur in the wire of an electrical circuit that is working properly?

Only one answer is correct among these 4 choices:
- The wire will become warmer.
- The wire will lose some of its mass.
- The wire will form an electric field.
- The wire will develop a new crystal structure.

Could you tell me which one is correct?

The wire will become warmer.