A cell drives a current through a circuit. The emf of the cell is equal to the work done in moving unit charge.
a) From the positive to the negative plate of the cell
b) From the positive plate, back to the positive plate
c) From the negative plate, back to the negative plate
d) From any point in the circuit back to the same point

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All are true

b & d are only true

a & b are only true

b, c & d are only true

answer is C.

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Detailed Solution

The emf of the cell is equal to the work done in moving unit charge from any point in the circuit back to the same point. The point can be the positive plate of the cell, negative plate of the cell or any other point in circuit.

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Best Online Course for NEET

Best Online Course for CBSE