# What is voltage in a circuit?

What is voltage in a circuit? We just started learning about electricity in my school. From what I understand; potential is potential energy per Coulomb and voltage means difference in potential. So, if you have a battery with 4 voltage and a wire connecting the poles of the battery, does that mean electrons at the negative pole will have a potential energy of $4*q$, where $q$ is the charge of the electron? And when the electrons have reached the positive pole, all the potential energy will have been transformed?

I have a feeling I'm not understanding this concept.

• Be VERY careful with the nomenclature for this subject matter. Voltage is also known as potential difference, which is DIFFERENT than electric potential, which is DIFFERENT than electric potential energy. Using only the term "potential" is incomplete and ambiguous. Mar 29 '19 at 18:09