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  • If the size of the electrode is doubled, then the internal resistance becomes

If the size of the electrode is doubled, then the internal resistance becomes

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Internal resistance (r) of a cell depends on factors like:

  • Electrode surface area
  • Electrolyte concentration
  • Distance between electrodes.

$$
\text { r }= { \rho}\frac{ l}{ A} 
$$

here, ρ = resistivity of the electrolyte, l = distance between electrodes and A = cross-sectional area of the electrodes

Doubling the electrode size results in a surface area in contact with the electrolyte increasing. Since resistance is inversely proportional to area, increasing the electrode size will decrease the internal resistance.

Posted by

Saniya Khatri

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