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Practical - Internal Resistance
This experiment allows you to find physical constants from a graph.
1. Internal Resistance and EMF
You can calculate the internal resistance of a cell by changing the external resistance of the circuit and recording the terminal PD of the cell. When a graph is plotted, the gradient is the negative value of 'r' while the y-intercept should be equal to the EMF of the cell.
2. Internal Resistance and EMF - Results
How to analyse some sample data to calculate a value for the EMF and internal resistance of a cell.
3. Internal Resistance and EMF - Teacher and Technician Guidance
A few extra notes for teachers and technicians who will be planning this practical for their classes.
Scientific equipment in these videos provided by Vitta Education.
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