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

Hi I've tried to solve this question but I keep getting stuck at a certain point, it probably very simple but any tips would be greatly appreciated

The EMF of a cell is measured using a potentiometer and is found to be 1.51V. When a voltmeter, which has a resistance of 3.5k Ohms is connected across the cell, it reads 1.49V. What is the internal resistance of the cell. What current flows through the voltmeter?

If a resistor of resistance 50 Ohms is connected across the cell, what current flows through it?

2. Relevant equations

Kirchhoff's rules

V=RI

3. The attempt at a solution

I said so far:

(internal resistance)*I = 1.51

1.49= I1*(3.5*10^3) - 1.51

& found I1 current flowing through voltmeter = 8.6*10^-4A but i dont know what to do from here and i think this might be wrong anyway...

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# Homework Help: Internal resistance question

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