Formula
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R
electrical resistance
V
voltage, electrical potential difference or electric tension
P
electric power
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Electrical resistance by Joule's law (given electric power and voltage)
Formula description
Joule's first law states that the rate of heat dissipation in a resistive conductor is proportional to the square of the current through it and to its resistance. Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points, and inversely proportional to the resistance between them.
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V
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R
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