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JEE Physics · Hard

Current Electricity: Potentiometer Sensitivity MCQ

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Potentiometer SensitivityHardQuestion 31667

Question

Sensitivity of a potentiometer can be increased by:
  1. A
    Using a cell with higher EMF as driver
  2. B
    Using a longer wire
    Correct
  3. C
    Increasing current through driver cell
  4. D
    Decreasing resistance of galvanometer

Correct answer

Using a longer wire

Explanation

Sensitivity = potential gradient = V/L. Using longer wire reduces gradient (mV/cm), allowing more precise balance measurements of small EMF differences.

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