Ahmed wants to shift the balance point of a potentiometre from the fourth wire to the fifth wire to measure the resistance of a cell.Which of the following options is CORRECT with respect to the electric current and the type of cell from which the current has been drawn?

Explanation

The correct answer is Option A. In a potentiometer setup, the balance point is determined by the reference voltage from a standard cell and the voltage across the cell under test. A standard cell with lower internal resistance provides a stable reference voltage, allowing for precise measurement of the cell's resistance by shifting the balance point effectively. Option B is incorrect because a higher internal resistance in the standard cell would result in an unstable reference voltage, making it difficult to accurately shift the balance point. Option C is incorrect because the cell characteristics do impact the potentiometer's balance point. Option D is incorrect because the balance point is determined by a singular reference voltage, not by drawing current equally from both cells.