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Who is credited with experimentally finding that current through a conductor is proportional to the voltage across it?
ABenjamin Franklin, an American scientist
BAndre-Marie Ampere, a French physicist
CAn unnamed team of 20th century engineers
DGeorg Simon Ohm, a German physicist
Answer & Solution
Correct answer: D. Georg Simon Ohm, a German physicist
1. A 19th century German physicist is named as the discoverer of this proportionality.
2. That physicist is identified as Georg Simon Ohm.
3. Franklin is credited elsewhere with the positive-charge current convention, and Ampere with the current unit, not this discovery.
4. So the correct credit for the voltage-current proportionality belongs to Georg Simon Ohm.
_Source: OpenStax Physics (CC BY 4.0), Ch 19 "Electrical Circuits", section Resistance and Ohm's Law_
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