(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

An automobile battery has a terminal voltage of 12.8 V with no load. When the starter motor, which draws 90 A, is running, the terminal voltage drops to 11 V. What’s the internal resistance of the battery?

2. Relevant equations

I think the solution must involve finding a Thenevin equivalent circuit?

3. The attempt at a solution

This is a problem from a homework written by my teacher, and from the reading in the book I have absolutely no idea where to start this one. Can anyone help point me in the right direction and help me see what the circuit is even supposed to look like?

Thanks for the help

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# Homework Help: Thenevin Equivalent?

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