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COMEDK2017PhysicsCurrent Electricity

In an ammeter 10 % of main current is passing through the galvanometer. If the resistance of the galvanometer is G , then the shunt resistance (in ) is

Options

  1. A9 G
  2. BG 9
  3. C90 G
  4. DG 90

Correct answer

B. G 9

Step-by-step solution

If I be the main current, then current passing through galvanometer, I_ g =10 % of I= I 10 Resistance of galvanometer, R_ g =G Shunt resistance, R_ S = I_ g R_ g I-I_ g = I 10 G I- I 10 = G 9

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