A cell is said to have an electromotive force (e.m.f.) of $6\,\text{V}$. What is meant by this?
- A$1$ coulomb of charge always dissipates $6\,\text{J}$ of energy in the internal resistance of the cell.
- B$1$ coulomb gains $6\,\text{J}$ of energy when passing through the cell.
- CThere is a potential difference of $6\,\text{V}$ applied across any external circuit connected to the cell.
- DWhen $1$ coulomb of charge passes through the cell, $6\,\text{J}$ of chemical energy is transformed.