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Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer. The value of the unknown resistor R is

Options

  1. A13.75
  2. B220
  3. C110
  4. D55

Correct answer

B. 220

Step-by-step solution

55 20 = R 80 R= 55 8 2 =220

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