- #1
FireZealot
- 5
- 0
Homework Statement
The problem includes a graph. All I have is a current to external resistance graph, with 20 A coming at 10R of external resistance. I am to find the EMF and internal resistance of the battery.
Here is the problem and my two attempts.
http://1drv.ms/1LKbu5H
Homework Equations
DeltaV = E - I * Rinternal
The Attempt at a Solution
[/B]
I included two of my attempts at a solution. In both cases I simplify the circuit such that I can find the R equivalent from Rinternal and Rexternal. While that can give me a ratio, I still don't know what the EMF of the battery is.
One idea I had was to assume the max current on the graph (60 amps) is the max current the system can take. If this is correct, then I can reformulate the earlier formula to find a 'max possible I'. With this, I can find E in terms of Rin and I do find a solution, though I am highly unconfident if this is allowed.