### Formula

P

power dissipated in a resistor

V

voltage, electrical potential difference or electric tension

R

electrical resistance

P

power dissipated in a resistor

V

voltage, electrical potential difference or electric tension

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.

V

R

P

Precision

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