MHT CET Physics question
In a potentiometer experiment of a cell of e.m.f. 1.25 V given balancing length of 30 cm. If the cell is replaced by another cell, balancing length is found to be 40 cm. What is the emf of the second cell?
Answer: (B)
Solution
, so V; the other values do not follow. Hence the correct option is (b).