Question

three 2v cells are connected in series and used as battery in circuit what is the potential difference at the terminals of battery

Answer 1

Unlike current which flows around a closed electrical circuit in the form of electrical charge, potential difference does not move or flow it is applied.

The unit of potential difference generated between two points is called the Volt and is generally defined as being the potential difference dropped across a fixed resistance of one ohm with a current of one ampere flowing through it. In other words, one volt = one amp x one ohm, or V = IxR.