Voltage is the physical quantity that, in an electrical circuit, drives electrons along a conductor. That is, it conducts electrical energy with greater or lesser power.
Voltage and volt are terms in homage to Alessandro Volta, who in 1800 invented the voltaic battery and the first chemical battery.
Voltage is a synonym for voltage and potential difference. In other words, voltage is the work per unit charge exerted by the electric field on a particle to make it move from one place to another. In the International System of Units, this potential difference is measured in volts (V), and this determines the categorization as "low" or "high voltage".
A volt is the unit of electric potential, electromotive force, and voltage. Some common voltages are that of a neuron (75 mV), a non-rechargeable alkaline battery (1.5 V), a rechargeable lithium cell (3.75 V), a car electrical system (12 V), electricity in a home (230 in Europe, Asia and Africa, 120 in North America and 220 some countries in South America), a train track (600 to 700 V), a high voltage electricity transmission network (110 kV) and a lightning (100 MV).
The term "high voltage" characterizes electrical circuits in which the voltage level used requires isolation and safety measures. This occurs, for example, in high-end electrical systems, in X-ray rooms, and in other areas of science and physics research. The definition of "high voltage" depends on the circumstances, but the possibility that the circuit produces an electrical "spark" in the air, or that contact or proximity to the circuit causes an electric shock is considered to determine it. An electric shock of magnitude applied to a human or other living beings can cause fatal cardiac fibrillation. For example, the strike of lightning in a storm on a person is often the cause of death.