CUET · PHYSICS · PYQ PAPER 2023
In a potentiometre, the balanced point is obtained when :
- A the emf of the battery becomes equal to the emf of the experimental cell
- B the potential difference of the wire between the + ve end and the jockey becomes equal to the emf of the experimental cell
- C the potential difference of the wire between the + ve end and the jockey becomes equal to the emf of the battery
- D the potential difference across the potentiometer wire becomes equal to the emf of the battery
Answer & Solution
Correct Answer
(A) the emf of the battery becomes equal to the emf of the experimental cell
Step-by-step Solution
Detailed explanation
At the balance point, the potential drop across the specific segment of the potentiometer wire exactly matches the emf of the cell being measured. Because these two potentials are equal and opposing, no current flows through the galvanometer, resulting in a zero (null)…
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