In the given potentiometer circuit arrangement, the balancing length AC is measured to be 250   cm .…

In the given potentiometer circuit arrangement, the balancing length AC is measured to be 250 cm. When the galvanometer connection is shifted from point (1) to point (2) in the given diagram, the balancing length becomes 400 cm. The ratio of the emf of two cells ε1ε2 is:

  1. 53
  2. 85
  3. 43
  4. 32

Solution

E1=k1 (1)

E1+E2=k2 (2)

E1E1+E2=12=250400=58

8E1=5E1+5E2

3E1=5E2

E1E2=53

Asked in: JEE Main 2021 (25 Jul Shift 2)

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