Define EMF of a cell ? hence derive general form of ohms law
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EMF
EMF is Electromotive Force, which is measured in coulombs of charge. It is pressure developed or an electric intensity from a electrical energy or a source. It is a device which converts any form of energy into electrical energy which is then measured with coulombs of charge. EMF i.e ElectroMotive Force id denoted by,
emf = I (R + r)
Where I is the current in amperes; R is the resistance of load in the circuit in ohms; r is the internal resistance in ohms.
emf = E/ Q
Where E is the energy in joules; Q is the charge in coulombs.
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