19-10-2017, 11:44 AM
The electromotive force (e) or e.m.f. is the energy provided by a cell or battery for each coulomb of charge passing through it, is measured in volts (V). It is equal to the potential difference between the terminals of the cell when no current flows.
![[Image: electromotive-force.jpg]](http://physicsnet.co.uk/wp-content/uploads/2010/08/electromotive-force.jpg)
e = electromotive force in volts, V
E = energy in joules, J
Q = coulomb load, C