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What is the difference between emf and voltage???????
Emf is potential difference generated at the two end of a source when no current is flowing.Voltage is the difference of electrical potential between two points of an electric circuit while a current is flowing.
Brother, emf is the potential difference of entire circuit. I.e. internet resistance of battery is also consider while calculating the emf. emf is given by:- E=I/(R+r) where R is externel resistance , r is internet resistance of battery. Voltage is the potential difference between two terminals of battery. I.e. internet resistance of battery will not considered while calculating voltage. Voltage is given by:- V=I/R
Emf is the voltage of the cell it is present even when no current is flowing ,whereas every component of a circuit can have different voltages .also voltage does not exist in any component if current is not flowing in the circuit .
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