AIIMS 2018 Physics Potentiometer MCQ Question

In a potentiometer setup, the balance point is achieved when the potential difference across the wire equals the e.m.f. of the experimental cell. If the e.m.f. of the driver cell or the potential difference across the potentiometer wire is less than the e.m.f. of the experimental cell, there will not be enough voltage to balance it, resulting in no balance point. Other options (2, 3, and 4) do not accurately reflect this relationship, as they may imply that balance points can be achieved under conditions that violate the fundamental principle of equal potential differences.