Physics, asked by taniya29apr, 10 months ago

state the principal of potentiometer . explain with the help of circuit diagram how potentiometer can be used to find the internal resistance of a primary cell.

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Answered by josh7655

Answer:

Working principle : Potential difference across length of potentiometer wire is proportional to the length of the wire. E=kL where, E is the emf and k is the potential gradient. ... Cell emf e whose internal resistance r is to be determined is connected via resistance box R.B. through key K2

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