Formula: Electric Power Electric current Electrical Resistance
$$P ~=~ R \, I^2$$
$$P ~=~ R \, I^2$$
$$I ~=~ \sqrt{ \frac{P}{R} }$$
$$R ~=~ \frac{P}{I^2}$$
Electric power
$$ P $$ Unit $$ \mathrm{W} = \frac{\mathrm J}{\mathrm s} $$
Electric power is the energy emitted / absorbed by a circuit per second, for example.
Electric current
$$ \class{red}{\boldsymbol I} $$ Unit $$ \mathrm{A} = \frac{ \mathrm C }{ \mathrm s } $$
Electric current (charges per time) flowing through a conductor, for example in a circuit. If you double the current, the power converted is quadrupled.
Electrical Resistance
$$ \class{brown}{R} $$ Unit $$ \mathrm{\Omega} = \frac{ \mathrm{kg} \, \mathrm{m}^2 }{ \mathrm{A}^2 \, \mathrm{s}^3 } $$
Electrical resistance impedes the flow of electrically charged particles in a conductor. If the current \(I\) is kept constant, the larger the resistance, the larger the power converted. The spot with the greatest resistance becomes the warmest.