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Practical - Internal Resistance

This experiment allows you to find physical constants from a graph.

  1. Measuring Internal Resistance and EMF

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1. Measuring 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.

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