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Wednesday, 9 January 2013

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 two 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 two points.

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