Question : The potential difference V across the ends of a given metallic wire in an electric circuit is directly proportional to the current flowing through it, provided its temperature remains the same. This is called ___________ law.
Option 1: Pascal's
Option 2: Charles's
Option 3: Ohm's
Option 4: Boyle's
Correct Answer: Ohm's
Solution : The correct answer is Ohm's Law .
Assuming that the temperature of a metallic wire stays constant, the potential difference across its ends in an electric circuit is directly proportional to the current passing through it. We refer to this as Ohm's law. Ohm's law states that the potential difference in a circuit is directly proportional to the current flowing through it. Resistance is the name given to the proportional constant. V = IR (where V is the potential difference, I is current, and R is resistance).
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