Describe potentiometer method of comparing e.m.f. of two cells
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Answer:
Potentiometer is a device used to compare EMF and, finding internal resistance and also to find potential difference.
Explanation:
To compare the emf: Take 2 batteries first connect with 1st one, then
E1=KL1
Then connect jokey with Second one
E2=KL2
now
divide both
E1/E2=KL1/KL2
E1/E2=L1/L2
E1=(LI)E2/L2
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