List the factors on which the resistance of a conductor depends.
Resistance
According to Ohm's law, the current passing through a conductor is directly proportional to the potential difference across this conductor.
Let be the current passing through the conductor and be the potential difference across the conductor, then their relationship can be expressed as,
According to the laws of proportionality,
where is the constant of proportionality or the resistance.
Hence, resistance is the parameter that resists the flow of current inside a conductor.
The SI unit of resistance is ohm or .
Factors affecting resistance
Hence, the resistance of a conductor mainly depends on the length and area of the conductor.