- #1

kaspis245

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- 1

## Homework Statement

It is known that total resistance of the circuit is dependent on the position of the wiper in potentiometer ##R##. Find the biggest and the smallest possible total resistances of the circuit. Potentiometer resistance is ##R=9r##.

## Homework Equations

Ohm's law.

## The Attempt at a Solution

Here's a redrawn image:

where ##R_1+R_2=R##.

This circuit reminds me of Wheatstone Bridge, so I approached the problem like this:

##V_1=\frac{2r+R_1}{3r+R_1}V##

##V_2=\frac{r+R_2}{4r+R_2}V##

I don't know what to do from here.