The energy given to each coulomb of charge by a 6 V battery is 6 joules.

Quick Scoop

To find how much energy is given to each coulomb, you use the relation between potential difference, work, and charge:

V=WQV=\frac{W}{Q}V=QW​

Here, VVV is the potential difference (6 V), WWW is the work done or energy in joules, and QQQ is the charge in coulombs. Rearranging:

W=V×QW=V\times QW=V×Q

For each coulomb , Q=1Q=1Q=1 C, so:

W=6×1=6 JW=6\times 1=6\text{ J}W=6×1=6 J

So, a 6 V battery gives 6 J of energy to each coulomb of charge that passes through it.

In simple words: a “6 volt” label literally means 6 joules of energy per coulomb of charge moved by the battery.