what is potential difference and where does it occur .what is the difference between e.m.f and P.D
Asked by jbathini | 5th Apr, 2009, 08:52: PM
The potential difference can be measured between any two points on an electric circuit.
Emf is the potential difference between the terminals of a cell if the current drawn from it is zero.
A cell is bound to have some internal resistance so when current flows there is a potential drop of Ir across the cell and V = E -Ir.
Answered by | 6th Apr, 2009, 09:55: AM
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