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.
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 is the charge transported within a certain time due to the applied voltage.
Time within which the current \(I\) has flowed.