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.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion
C. If assertion is true but reason is false
D. If the assertion and reason both are false.

Answer

A

Explanation

If either the e.m.f. of the driver cell or potential difference across the whole wire is lesser than the e.m.f. of experimental cell, then balance point will not obtained.