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# Voltage? watch

1. Is potential difference is a circuit the same as how much electric potential energy each coulomb of charge has lost between two points
2. Yes, p.d. is the energy given up by unit charge as it 'moves' between A and B.
3. (Original post by AeroPlane04)
Yes, p.d. is the energy given up by unit charge as it 'moves' between A and B.
What do you mean by 'moves'? And is p.d. exactly the same as voltage?
4. (Original post by park1996)
Is potential difference is a circuit the same as how much electric potential energy each coulomb of charge has lost between two points
Yes, as voltage, charge and energy are connected by:
V=E/Q
Where V= potential difference (V), E= energy (J) and Q= charge (C)
5. (Original post by Nistar)
Yes, as voltage, charge and energy are connected by:
V=E/Q
Where V= potential difference (V), E= energy (J) and Q= charge (C)
To clarify, is electric potential energy the energy supplied to the charges as it passes through the cell(s), or is it the amount of work done to the charges to move them from a high p.e to a low p.e. by the cells?

And also is this correct:the charges leave the negative end of the terminal they have high p.e. and once they return to the circuit, they have lost electrical potential energy by doing work in the circuit (i.e. charges transferring energy to the components in the circuit to allow them to work)?
6. (Original post by park1996)
What do you mean by 'moves'? And is p.d. exactly the same as voltage?
It's another way of referring to an energy transfer (or energy given up) when a unit positive charge passes a point A first, and then a point B (i.e. the difference in potential).
Yes, voltage is the same as potential difference (technically it's correct to use p.d., but in everyday language, voltage is generally used instead).

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