Who among the following gave the law: “The potential difference across the ends of a resistor is directly proportional to the current through it, provided its temperature remains the same”.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Georg Simon Ohm
The law quoted is Ohm’s law, stated in 1827 by the German physicist Georg Simon Ohm. If the temperature of a conductor stays the same, the potential difference \(V\) across it is directly proportional to the current \(I\) through it: \(V\propto I\), or \(V=IR\), where the constant \(R\) is the resistance of the conductor. The unit of resistance, the ohm (Ω), is named after him.