Recent content by Reliquo

So if the no-load terminal voltage of the battery is the EMF (12.8V) this would give: V= EMF- Ir 11.0 V = 12.8 V - 90A(r) -1.8 V= -90Ar .02 = r (Internal resistance) So is this correct then?

Homework Statement An automobile battery has a terminal voltage of 12.8 V with no load. When the starting motor (which draws 90A) is running, the terminal voltage drops to 11.0 V. What is the internal resistance of the battery? Homework Equations V= EMF- Ir The Attempt at a Solution I think...