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DC Theory LMS Practice Test
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Electromotive force is measured in which unit?
Volts
Amps
Ohms
Watts
Reveal Answer
Correct Answer:
Volts
Explanation:
Emf is the energy per unit charge that a source provides to push charges around a circuit. The unit used for this potential difference is the volt, with 1 volt equaling 1 joule per coulomb (V = J/C). This tells you how strongly a source can drive current: a higher emf means more energy per charge available to move charges through the circuit. The other quantities describe different things: amperes measure how much charge flows per second (current), ohms measure resistance, and watts measure power. So the unit for electromotive force is volts.
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