### Formula

V

voltage, electrical potential difference or electric tension

P

power dissipated in a resistor

R

electrical resistance

V

voltage, electrical potential difference or electric tension

P

power dissipated in a resistor

R

electrical resistance

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.

P

R

V

Precision

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