Answer to Question #304107 in Physics for tim

Question

A 12-volt battery has an internal resistance of 0.01$\Omega$. The starter motor of the car draws a current of 230 A. What is the potential difference between the terminal of the battery at this time

Answer 1

The potential difference between the terminal of the battery

$$V={\cal E}-Ir\\ =12-230*0.01=9.7\:\rm V$$