The unit used to measure electromotive force (emf) is the

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Context: The question asks about the unit used to measure electromotive force (emf).
Option 1: horsepower. This unit measures power, not emf, so it does not describe electrical potential or driving force in a circuit.
Option 2: ampere. The ampere is the unit of electric current, which quantifies flow, not the potential difference that drives that flow.
Option 3: coulomb. The coulomb is a unit of electric charge, not the potential difference or emf that acts to move charges.
Option 4: volt. This is the correct unit for electromotive force or potential difference; by definition, emf is measured in volts, representing the energy per unit charge.
Option 5: electromagnetic Faraday. This term does not denote a unit; it seems to refer to Faraday’s law or electromagnetic concepts, not a unit of emf.

CHM-1020-LD01.2025SU PS III (Part II)- Electrochemistry

The unit used to measure electromotive force (emf) is the

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