Pros
a means to measuring the pieces of energy.
Cons
Current, and not voltage, is what that can kill in electrical accident.
Real Talk
It’s important to learn about the basic SI units related to electrical power and energy. The current flowing through a conductor (e.g. a wire) is directly proportional to voltage, as expressed in Ohm’s law: I=V/R (I=intensity or current, V=voltage, R=Resistance )