Question

Item 3

What causes an electric current in a wire?


Electrons flow because of electrical attraction and repulsion.


Electric fields cause atoms to move in the wire.


Electrons build up in the wire and create a charge.


Electrons move because of heat.

Answer 1

A

Step-by-step explanation:

The definition of current is the differential change in charge over a differential change in time. In the case of the wire, a source, say a battery, sends electrons from one terminal to another terminal. The medium through which these electrons move is the wire. Therefore, the charge flowing through the wire over time creates an electric current, by definition.