Rate of emf decline and rate of change of internal resistance

AI Thread Summary
The discussion focuses on a research project involving the measurement of electromotive force (emf) and internal resistance of a test cell using a potentiometer. The researcher aims to use a resistor as a load while obtaining two balance points for emf and internal resistance calculations. Participants request a circuit diagram to better understand the setup and inquire about the equations planned for internal resistance calculation. The conversation emphasizes the need for clarity in experimental design to facilitate accurate measurements. Overall, the thread seeks collaborative input on experimental methodology in electrical measurements.
williamkat
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Hello everyone, I am trying to work on this topic as my research. i plan on using a potentiometer but i want to be able to use the resistor (across the test cell) as the load and still be able to obtain two balance points. one for emf, and another for calculating internal resistance as the cell is being drained by the resistor. any help please?
 
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williamkat said:
Hello everyone, I am trying to work on this topic as my research. i plan on using a potentiometer but i want to be able to use the resistor (across the test cell) as the load and still be able to obtain two balance points. one for emf, and another for calculating internal resistance as the cell is being drained by the resistor. any help please?

Welcome to the PF.

Can you please post a circuit diagram of your setup? What equations are you going to use to calculate the internal resistance of your voltage supply?
 
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