# What does this thing on batteries mean?

## Main Question or Discussion Point

Say that 6V battery is connected to a lamp that takes 3V from each coulomb. Does that mean that the battery can supply 6V or dependent upon the need of components in the circuit ?

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Svein
Say that 6V battery is connected to a lamp that takes 3V from each coulomb.
What do you mean? "Take 3V from each coulomb" is totally meaningless.

I mean 3 joules of energy from each coulomb.

cnh1995
Homework Helper
Gold Member
Does that mean that the battery can supply 6V or dependent upon the need of components in the circuit ?
It will supply 6V to any lamp connected across it since it is a 6V battery. Work done per unit charge is the potential difference, which is 6V here.

Svein
I will try to answer what I think you mean (not what you asked). The capacity of a battery is usually given in mAh (milliampère-hours) or Ah (ampère-hours). To translate this to coulombs, note that 1Ah = 3600 coulomb (or use http://www.rapidtables.com/convert/charge/ah-to-coulomb.htm).

Drakkith
Staff Emeritus