Charge and Coulombs ($C$)

Charge is the property of matter that causes force to be exerted in an electromagnetic field. Protons are positively charged and electrons are negatively charged. Charge is measured in coulombs ($C$). One coulomb is approximately equal to $6.2415090744 \cdot 10^{18}$ elementary charges (i.e. electrons or protons). The charge of one electron is therefore $-1.602176565 \cdot 10^{-19}C$.

Coulombs form the basis for amps, which describe the amount of charge moving past a fixed point per second (the "flow"), and volts, which describe the difference in charge between two points. One coulomb is equal to one amp ($A$) per second ($s$), or $C = A/s$, and one coulomb is equal to one joule per volt, or $C = J/V$.

Deeper Knowledge on Charge and Coulombs

Current and Amperes

The flow of electricity, measured in amps

Voltage and Volts

Electrical potential energy, measured in volts

Broader Topics Related to Charge and Coulombs

Atoms

The basic units of chemical elements

International System of Units (SI)

Formal terms and definitions of the metric system

Electrical Engineering

Build and deconstruct electrically powered devices

Electricity

Energy that results from charged particles