A cell supplied 10J of energy to circulate 20C charge ones in closed circuit what is EMF?
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Answer:
Given:
A cell performs 10 J of work done to circulate 20 C of charge along a closed circuit.
To find:
EMF of the cell
Concept:
Voltage of a cell is actually the work done to transport a unit position charge from one point to another.
EMF = (Work done)/Charge
Calculation:
EMF = (Work done)/Charge
=> EMF = 10/20
=> EMF = 0.5 volts.
Please note the fact that, since we are considering a closed circuit, it is better to term EMF as Potential Difference.
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