Final answer:
Voltage, or electric potential, is the energy per unit charge required to move a test charge. It is measured in volts and compared to pressure in fluid flow.
Explanation:
Voltage is another term used for electric potential, which represents the energy per unit charge required to move a test charge between two points. It is measured in volts (V), where 1 volt is equal to 1 joule per coulomb. Voltage is analogous to pressure in fluid flow, where the current is akin to the flow itself.
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