Question

For comparing the e.m.f.'s of two cells with a
potentiometer, a standard cell is used to
develop a potential gradient along the wires.
Which of the following possibilities would
make the experiment unsuccessful
The e.m.f. of the standard cell is larger than
a) the E e.m.f.'s the two cells
b) The diameter of the wires is the same and uniform throughout
c) The number of wires is ten
d) The e.m.f. of the standard cell is smaller than
the e.m.f.'s of the two cells​

Answer 1

Answer:

Correct option is

D

The electromotive force of the standard cell is smaller than the electromotive force of the two cells.

The emf of the cell standard cell must be greater than that of experiment cells, otherwise balance point is not obtained.