Chemistry · Electrochemical cells: Electrolytic and Galvanic cells, different types of electrodes, electrode potentials including standard electrode potential, half-cell and cell reactions
Internal resistance of a battery cell increases with:
Internal resistance of a battery cell increases with:
- A. increase in concentration of electrolyte
- B. increase in distance between two electrodes
- C. increase in area of the plates inside the electrolyte
- D. increase in size of the electrodes
Step-by-step solution
Internal resistance (r) of a battery cell is given by r = d/(σA), where d is distance between electrodes, σ is conductivity of electrolyte, and A is area of electrodes. Thus, r is directly proportional to d. Increasing distance between electrodes increases internal resistance, while increasing electrolyte concentration (increases σ) or electrode area/size (increases A) decreases internal resistance.
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