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The SI unit of electric charge, the coulomb, is named after which scientist?
AAlessandro Volta, who invented the first electric battery
BMichael Faraday, who defined the unit of capacitance
CRobert Millikan, who first measured the electron's charge
DCharles Augustin de Coulomb, who studied electrical force
Answer & Solution
Correct answer: D. Charles Augustin de Coulomb, who studied electrical force
1. A French physicist who studied the force between charged objects lends his name to the coulomb unit.
2. That physicist is Charles Augustin de Coulomb.
3. Faraday is credited with capacitance and the farad, Millikan measured the electron's charge, and Volta is credited with the battery and the volt, so none of them fit here.
_Source: OpenStax Physics (CC BY 4.0), Ch 18 "Static Electricity", section Electric Charge_
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