When we buy a ‘battery’—such as an AA battery for a television remote control—it is often labelled ‘1.5 V’.
(a) What energy transfer takes place in a battery when it is used in an electrical circuit?
(b) What does the label ‘1.5 V’ on the battery really mean?
(c) i How is the emf, ϵ , of the battery usually different to the terminal voltage, V , of the battery.
ii Under what conditions are the emf and the terminal voltage the same?