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A shunt of resistance 1 ~ is connected across a galvanometer of 120 ~ resistance. A current of 5.5 ampere gives full scale deflection in the galvanometer. The current that will give full scale deflection in the absence of the shunt is nearly :

Options

  1. A5.5 ampere
  2. B0.5 ampere
  3. C0.004 ampere
  4. D0.045 ampere

Correct answer

D. 0.045 ampere

Step-by-step solution

The current that will given full scale deflection in the absence of the shunt is nearly equal to the current through the galvanometer when shunt is connected i.e. I _ g As I_g= I S G+S = 5.5 1 120+1 =0.045 ampere

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