Final answer:
In physics, the amount of potential necessary to cause one coulomb to produce one joule of work is measured in volts (V). If one coulomb of charge moves through a potential difference of one volt, it will produce one joule of work. The relationship between potential difference, current, and power is given by the equation P = IV.
Step-by-step explanation:
The amount of potential necessary to cause one coulomb to produce one joule of work is a Volt (V). Potential difference is the work done per unit charge, which is measured in volts. It is defined as one joule per coulomb.
For example, if one coulomb of charge moves through a potential difference of one volt, it will produce one joule of work.
The relationship between potential difference, current, and power is given by the equation P = IV, where P is the power in watts, I is the current in amperes, and V is the potential difference in volts.