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Can someone please define me EMF....class …

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Can someone please define me EMF....class 12

Posted by Sujit Kumar 5 years, 7 months ago

CBSE > Class 12 > Chemistry

2 answers

Sahil Kumar 5 years, 6 months ago

Emf of a cell-- It is a maximum potential difference across the terminals of a cell in an open circuit.

Rohit Krishna 5 years, 6 months ago

EMF or electro motive force is the potential difference across the two electrodes(anode and cathode) of a cell when the cell is not connected to a circuit.It is different from that of terminal potential difference which is the p.d across the circuit or across the resistances in an external circuit.Terminal p.d is smaller than emf. Generally,V=emf-I*r (where r is the internal resistance of cell,V is the terminal p.d I is the current).Note that there are cases when the equation changes.

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