A standard cell of e.m.f. 1.5 V balances at 60 cm on a potentiometer wire. Another cell balances at 80 cm. Its e.m.f. is:

  1. 2 V
  2. 4 V
  3. 1 V
  4. 1.12 V
Answer

A) 2 V

mathcalE2mathcalE1 = l2l1 Rightarrow mathcalE2 = 1.5 8060 = 2 V. SLO P-09-E-23 · Application

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