A potential gradient is created in the w...

A potential gradient is created in the wire by a standard cell for the comparision of emf's of two cells in a potentiometer experiment. Which possibility of the following will cause failure of the experiment.

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Comparision Of Emf Of Two Cells

How will you campare emf of two cells by potentiometer?

How the emf of two cells are compared using potentiometer ?

In comparing emfs of two cells by a potentiometer,balance point is obtained on 5^(th) wire, the current flowing through the wire is taken

The emf of the driver cell in the potentiometer experiment should be greater than the emf of the cell to be determined. Why?

Assertion : The e.m.f. of the drivercell in the potentiometer experiment should be greater than the e.m.f. of the cell to determined.