Internal resistance of a cell depends on following factors-
(A) Nature of the electrolyte
(B) Concentration of the electrolyte
(C) Temperature of the electrolyte
(D) Distance between the two electrodes
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A), (B), (C) and (D)
The internal resistance is the resistance offered by the electrolyte to the flow of ions between the electrodes. Like any resistance it depends on the material and its condition, and on the length and area of the path.
(A) Nature of the electrolyte — Correct. Different electrolytes have different resistivities.
(B) Concentration of the electrolyte — Correct. The concentration changes the number of ions available to carry current.
(C) Temperature of the electrolyte — Correct. Ions move more freely at a higher temperature, so the internal resistance decreases as temperature rises.
(D) Distance between the two electrodes — Correct. The distance is the length of the ionic path; a larger distance gives a larger resistance.