A potentiometer can compare two resistances R1 and R2 carrying the same current by comparing:

  1. their masses
  2. their temperatures
  3. the balance lengths for the p.d.s across them
  4. their colours
Answer

C) the balance lengths for the p.d.s across them

R1R2 = l1l2. SLO P-09-E-23 · Application

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