Electric Voltage states that, according to the structure of an atom, we know that there are two types of charges: Positive and Negative. A force of attraction exists between these positive and negative charges. A certain amount of energy (work) is required to overcome the force and move the charges through a specific distance.
All opposite charges possess a certain amount of potential energy because of the separation between them. The difference in potential energy of the charges is called the Potential Difference.
- dw is the small change in energy,
- dq is the small change in charge,
- energy (W) is expressed in joules (J),
- charge (Q) in coulombs (C), and
- voltage (V) in volts (V).
Define One Volt:
One volt is the potential difference between two points when one joule of energy is used to pass one coulomb of charge from one point to the other.