Answers

2014-09-22T19:15:22+05:30
Potential Difference is a work done in bringing the unit positive charge from infinity to the vicinity of similar positive charge.

When circuits are closed then the potential difference across the ends of the terminal of the cell is known as Emf...
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2014-09-22T19:49:10+05:30
Potential difference is the work done in bringing a  unit positive charge from higher potential to a lower potential and emf is the electromotive force developed  between the ends of closed circuit
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