Volt
The volt is the sl uNIT that measures voltage. Voltage is also known as electromotive force(e.m.f.)or'potential difference'. This is the difference in the ENERGY of an electric charge at two different points. One volt is the potential difference between two points if one Joule of energy is needed to take one couLoMB of charge between the points. One volt of potential difference across a
REsIsTANcE of one ohm produces a current of one AMpERE. Electric charges flow, if they can, to the point where their energy is lowest so the potential difference.
or voltage, is the driving force for currents.
Voltages are measured using a voltmeter; these can work by using the voltage to be measured to send an electric current through a resistance. The magnetic field of this current then moves the needle on the voltmeter's scale to show how many volts are flowing. More accurate