Stored Electricity: Voltage and Volts ()
Stored electricity is called voltage and is measured in volts. More precisely, voltage is the difference in electric potential energy between two points.
Another way to put it is, a volt is the amount of electricity required to accelerate 1kg by 1 meter per second squared (a joule) for 1 second (resulting in a displacement of ), divided by the quantity of electrical charges (coulombs). In other words, a volt is "how much work can be done per coulomb".
Voltage can be derived by Ohm's Law as .
Video: Voltage (Khan Academy)
Volts and voltage are both named after Alessandro Volta, who invented the first battery in 1800.
Deeper Knowledge on Voltage and Volts
Conductance and Siemens
The ability to conduct to current, measured in siemens
Resistance and Ohms
Opposition to current, measured in ohms
Watt's Law (Power Law)
A formula to define the relationship between power, voltage, and current (P=IV)
A formula for determining voltage, current, and resistance
Broader Topics Related to Voltage and Volts
Charge and Coulombs
How force is exerted in electromagnetic field, measured in coulombs
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