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Question

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

A
V=IR
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B
V=IR
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C
V=RI
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D
R=IV
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Solution

The correct option is A V=IR
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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