Charge and Coulombs ()
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 (). One coulomb is approximately equal to elementary charges (i.e. electrons or protons). The charge of one electron is therefore .
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 () per second (), or , and one coulomb is equal to one joule per volt, or .
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
The basic units of chemical elements
International System of Units (SI)
Formal terms and definitions of the metric system
Build and deconstruct electrically powered devices
Energy that results from charged particles