Electric Circuits and Current Electricity

Basic concepts and definitions regarding electric circuits, current, and potential difference.

How is electric current defined?

The amount of charge that flows through any cross-section of a conductor in a given time.

What is the unit used for electric current?

Ampere ($A$)

How is electric potential defined?

The amount of work required to move a single positive charge from an infinite distance to a point next to a charged object.

What is the unit of electric potential?

Volt ($V$)

What is the potential difference between two points?

The work to move a unit charge or $1\,C$ charge from one point to another.