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KCET2011PhysicsMagnetic Effects of Current

The deflection in a moving coil galvanometer is reduced to half when it is shunted with a 40 coil. The resistance of the galvanometer is

Options

  1. A80
  2. B40
  3. C20
  4. D15

Correct answer

B. 40

Step-by-step solution

We know, gathered I_ G I = 1 2 S G+S = 1 2 I_ G I = 40 G+40 = 1 2 G=40 gathered

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