question_answer

In potentiometer a balance point is obtained, when

A)                    The e.m.f. of the battery becomes equal to the e.m.f. of the experimental cell

B)                    The p.d. of the wire between the +ve end to becomes equal to the e.m.f. of the experimental cell

C)                    The p.d. of the wire between +ve point and jockey becomes equal to the e.m.f. of the battery

D)                    The p.d. across the potentiometer wire becomes equal to the e.m.f. of the battery