Describe the method of comparison of emfs of two cells
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A potentiometer is a device used to compare the e.m.f of any two cells, to measure the internal resistance of a cell and also to measure the potential difference across a resistor in a circuit.
We generally use a voltmeter to measure the potential difference across a resistor in a circuit
We generally use a voltmeter to measure the potential difference across a resistor in a circuit
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