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Jreyes613

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## Homework Statement

A variable resistor, R, is connected to the terminals of a battery (dashed box in the diagram). The graph below shows data collected in the circuit as R is varied. What is V0, in volts?

What is the internal resistance, r, in ohms?

## Homework Equations

Ohm's Law

## The Attempt at a Solution

I know that for this case, Vo will be found where the current is calculated to be at its lowest.

from the graph that i am given, It is not clear where it will equal zero, as for the internal resistance, i know that I=ε/r

so

-r=dV/dI

the slope of a V vs I graph will give the internal resistance.

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