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Draw a labelled circuit diagram of a potentiometer to compare emfs of two cells. Write the working formula (Derivation not required).

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Draw a labelled circuit diagram of a potentiometer to compare emfs of two cells. Write the working formula (Derivation not required).

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The required circuit diagram is given alongside.

Working formula, \(\frac{E_1}{E_2}=\frac{l_1}{l_2}\)

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