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Current Electricity — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity4 Marks
Question
On what factors does the internal resistance of a cell depend?
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Answer

The internal resistance of a cell depends on :
  1. Nature of the electrolyte :
    The greater the conductivity of the electrolyte, the lower is the internal resistance of the cell.
  2. Separation between the electrodes :
    The larger the seperation between the electrodes of the cell, the higher is the internal resistance of the cell. This is because the ions have to cover a greater distance before reaching an electrode.
  3. Nature of the electrodes.
  4. The internal resistance is inversly proportional to the common area of the electrodes dipping in the electrolyte.

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