Formula: Electrical Energy Voltage Electric current Time
$$W ~=~ U \, I \, t$$
$$W ~=~ U \, I \, t$$
$$U ~=~ \frac{W}{I \, t}$$
$$I ~=~ \frac{W}{U \, t}$$
$$t ~=~ \frac{W}{I \, U}$$
Electrical energy
$$ W $$ Unit $$ \mathrm{J} = \mathrm{Nm} = \frac{ \mathrm{kg} \, \mathrm{m^2} }{ \mathrm{s}^2 } $$
Electrical energy that a charge carrier gains or loses when it traverses the voltage \(U\). A positive charge moving parallel to the electric field lines would gain energy, while a positive charge moving antiparallel to the field lines would lose the energy.
Voltage
$$ U $$ Unit $$ \mathrm{V} = \frac{ \mathrm J }{ \mathrm C } = \frac{ \mathrm{kg} \, \mathrm{m}^2 }{ \mathrm{A} \, \mathrm{s}^3 } $$
The electrical voltage indicates how large the potential difference between two points is. Thus, the voltage indicates how much energy a charge carrier gains or loses when it travels the path between two points.
Electric current
$$ \class{red}{\boldsymbol I} $$ Unit $$ \mathrm{A} = \frac{ \mathrm C }{ \mathrm s } $$
Electric current is the charge transported within a certain time due to the applied voltage.
Time
$$ t $$ Unit $$ \mathrm{s} $$
Time within which the current \(I\) has flowed.