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KCET2025PhysicsCurrent Electricity

In an experiment to determine the figure of merit of a galvanometer by half deflection method, a student constructed the following circuit. He unplugged a resistance of 5200 in R . When K ₁ is closed and K ₂ is open, the deflection observed in the galvanometer is 26 div. When K₂ is also closed and a resistance of 90 is removed in S , the deflection between 13 div. The resistance of galvanometer is nearly

Options

  1. A45.0
  2. B103.0
  3. C91.6
  4. D116.0

Correct answer

C. 91.6

Step-by-step solution

aligned & G = S ^ Q ₁ Q ₂ -1 & G = 90 26 13 -1 & G =90 91.6 aligned

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