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Resistance:
The property of a conductor due to which it opposes a flow of (electric) current through it is called (electric) resistance and it is numerically equal to the ratio of the (electric ) potential difference across its end to the current flowing through it. its SI unit is the ohm.
Resistance, R= Potential difference ( V ) / Current ( I )
Ohm's law:
The law stating that the direct current flowing in a conductor is directly proportional to the potential difference between its ends. It is usually formulated as V = IR, where V is the potential difference or voltage, I is current, and R is the resistance of the conductor.
To students of electronics, Ohm's Law (E = IR) is as fundamentally important as Einstein's Relativity equation (E = mc²) is to physicists.
E = I x R
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