Voltage is the change in electric potential (meaning potential energy per unit charge) between two positions.

The Peltier coefficients represent how much heat is carried per unit charge.

The ions are shown as spheres with unit electrical charge.

The force per unit charge is called a "field".

These cars were meant for very rough usage, but I had no idea how long or how far their unit charges would take them.

In other words it is the work done by taking a unit charge round a circuit.

The electric potential is in this case the electrostatic potential energy per unit charge.

It can also be defined as the work that is done to move a unit charge from one point to another in the circuit.

This is always less than the unit charge associated with an ion but has no real fixed value.

When this agreement expired, the company was forced into an annual contract with the prospect of yearly increases in the unit charge.