# What is OHM'S law???

The current through a metallic wire is directly proportional to the potential difference applied across the wire, provided its temperature remains the same.

That is $\inline V\propto I$  where V is the potential difference and I is the current flowing

or

$\inline V=IR$ where R is the resistance. The unit of resistance is ohm. That is the graph between I and V will be a straight line and the slope of the graph gives the value of resistance.

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