Question:medium

PH meter has

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To measure any electrical potential difference (voltage), you need two reference points.
Similarly, to measure electrochemical potential in pH sensing, you must have two half-cells: a reference half-cell and an indicator half-cell.
Updated On: Jul 6, 2026
  • one cell
  • two cells
  • three cells
  • no cell
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The Correct Option is B

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