Q. 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 jockey 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
Explanation
The correct answer is Option B: The p.d. of the wire between the $+ ve$ end to jockey becomes equal to the e.m.f. of the experimental cell.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.