Chapter 37, Problem 17A

What fundamental quantity underlies the concepts of voltages and currents?

To determine

To explain: The fundamental quantity underlying the concepts of voltages and currents.

Explanation of Solution

Introduction:

Voltages and currents are established in a circuit when electric field exists between two points.

Potential difference or voltage between two points arises when there is an electric field existing between those two points. When electric field is setup in a circuit, it exerts force on charges, due to which charges flow. This flow of charges leads to currents.

Conclusion:

Electric field is the fundamental quantity underlying the concept of voltages and currents.