alleryStart learning →Who first showed experimentally that the current in a metal wire is directly proportional to the applied voltage?
AThomas Edison
BGeorg Simon Ohm
CNikola Tesla
DBenjamin Franklin
Answer & Solution
Correct answer: B. Georg Simon Ohm
1. The proportionality between current and applied voltage was established by experiment, not by theory.
2. Georg Simon Ohm, a German physicist, was the first to demonstrate it for a metal wire.
3. The relation now carries his name and his name is also used for the unit of resistance.
4. Franklin fixed the sign convention for charge, while Edison and Tesla worked on power distribution much later.
_Source: OpenStax College Physics (CC BY 4.0), Ch 20 "Electric Current, Resistance, and Ohm's Law", section Ohm's Law_
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