Which among the following is correct, where I = current, V = Potential difference & R = Resistance?

V = I R

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V = \frac{I}{R}

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V = \frac{R}{I}

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R = I V

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Solution

The correct option is A $V = I R$
Ohm's law states that at constant temperature, the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance, the equation becomes,
V = IR
where I is the current through the conductor in units of amperes, V is the voltage measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms.

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