Volt
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The volt is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI).
Josephson voltage standard chip developed by the National Bureau of Standards as a standard volt
A multimeter can be used to measure the voltage between two positions.
1.5 V C-cell batteries
Alessandro Volta
Voltage
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Voltage, also known as (electrical) potential difference, electric pressure, or electric tension is the difference in electric potential between two points. In a static electric field, it corresponds to the work needed per unit of charge to move a positive test charge from the first point to the second point. In the International System of Units (SI), the derived unit for voltage is the volt (V).
Batteries are sources of voltage in many electric circuits.
Working on high voltage power lines
Multimeter set to measure voltage