Question

Two cells of emfs 3 V and 5 V are to be separately compared using a potentiometer of length 2 m. Which arrangement is suitable for this purpose?

Answer 1

Answer:

given:- Two cells of emfs 3 V and 5 V are to be separately compared using a potentiometer of length 2 m

arrangement is suitable for this purpose is that   The battery that runs the potentiometer should have voltage 8 V and series resistance R is adjusted so that the potential drop across the wire slightly exceeds 5 V.

explanation:

Emf of a cell can be measured, if drop across potentiometer wire is more than emf of cell to be measured. Therefore potential drop across potentiometer wire must be more than 5 V.

Answer 2

Refer to the attachment!^^ ❤️