Chapter 22, Problem 3CQ

What causes electrons to move through a wire as a current?

To determine

To explain: The cause for the movement of electrons through a wire.

Answer to Problem 3CQ

The cause for the movement of electrons through a wire is the potential difference.

Explanation of Solution

The electrons in a wire (conductor) moves from one terminal to the other when it is connected to a battery. The battery provides the potential difference in order to move the electrons from lower potential to the higher potential and subsequently establish the electrical field.

The electrical potential difference points the electrical field from higher potential towards lower potential.

The flow of electrons from lower potential to the higher potential in a conductor causes the flow of current from higher potential to the lower potential.

Conclusion:

Thus, the cause for the movement of electrons through a wire is the potential difference.