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Ohm's Law :-
Electricity is the movement of electrons. Electrons create charge, which we can harness to do work. Georg Ohm was a Bavarian scientist who studied electricity. Ohm starts by describing a unit of resistance that is defined by current and voltage. Combining the elements of voltage, current, and resistance, Ohm developed the formula: V = IR
Where
•V = Voltage in volts
•I = Current in amps
•R = Resistance in ohms
This is called Ohm’s Law.

This video explains how to determine the resistance per cm of a given wire by plotting a graph of potential difference versus current.

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