Voltage is a physical quantity that characterizes the potential difference between two points in an electric field and indicates how much work is required to move a unit charge from one point to another:
$$U = \frac{A}{q}$$
where,
A— work done by the electric field to move the charge;
q— charge.
The unit of voltage in the SI system is volt (V). Voltage is 1V when an electric field does 1 joule (1J) of work in moving one coulomb (1C).
Voltage FAQ
What is voltage?
Voltage is the electric potential difference between two points.
What is the voltage formula?
Voltage equals work done divided by charge: U = A / q.
