A volt is the amount of potential necessary to cause one coulomb to produce which unit of work?

A volt is defined as the potential difference required to move one coulomb of electric charge with an amount of energy equal to one joule. This definition comes from the formula relating voltage (V), charge (Q), and work (W), which is expressed as V = W/Q. Therefore, if you have one volt, it implies that one coulomb of charge can do one joule of work. This relationship is fundamental in electrical engineering and physics, as it helps to understand how electrical systems operate concerning energy transfer and voltage levels.

The other options are units of measurement relevant in electrical contexts, but they don't directly address the question about the unit of work produced. Watts measure power, which is the rate of doing work, while newtons are a unit of force. Kilowatts are simply a larger unit of power, indicating the use of energy over time, but they do not pertain directly to the work done by a single coulomb under a potential difference.