what is voltage

Voltage, also known as electric pressure, electric tension, or potential difference, is the difference in electric potential between two points. It is the pressure from an electrical circuits power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light. Voltage is measured in volts (V) . The term "potential difference" is often used interchangeably with voltage, and it might be better defined as the potential energy difference between two points in a circuit. A voltmeter can be used to measure the voltage between two points in a system. Voltage can represent either a source of energy or the loss, dissipation, or storage of energy. In physics, voltage can be calculated using Ohm’s Law, which tells us that voltage equals resistance times current.