A volt is the amount of potential needed to cause one what to produce one what of work?

• A. Electron, volt
• B. Coulomb, joule
• C. Joule, watt
• D. Coulomb, ampere

Answer: (B)

In this context, the correct answer highlights the relationship between electric potential, charge, and work. A volt is defined as the potential difference that will cause one coulomb of electric charge to do one joule of work.

This definition is grounded in the basic principles of electricity. When a voltage is applied, it indicates how much energy per unit charge is available to do work in an electric circuit. Specifically, one volt represents the potential energy of one joule per coulomb of charge.

This foundational concept is crucial for understanding how electrical systems operate, as it links the concepts of voltage (potential), charge (coulombs), and work (joules) in a clear and quantifiable manner.