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Tuesday, 18 December 2012

Comparison of emf and potential difference


Comparison of emf and potential difference
1.      The difference of potentials between the two terminals of a cell in an open circuit is called the electromotive force (emf) of a cell. The difference in potentials between any points in a closed circuit is called potential difference.
2.      The emf is independent of external resistance of the circuit, whereas potential difference is proportional to the resistance between any points. 

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