Physics, asked by mohan7515, 1 month ago

Define EMF of a cell ? hence derive general form of ohms law​

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Answered by rafiya81
3

Answer:

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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