Question #ace79

1 Answer
Feb 14, 2016

The answer is B, electric energy.


Remembering that electromotive force (emf) = work done / change in charge, we see that the dimensions of (energy / charge) are potential difference, which has units of volts. Therefore if potential difference is multipled by charge they will be equivalent to work, which has the same units as energy.

Note that the word 'force' in emf isn't the same as mechanical force, rather it's an electrical potential measured in volts equal to energy per unit charge. Be careful becasue it's easy to get confused between these two types of 'force' (electrical and mechanical).