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A galvanometer of resistance 50 Ω is converted into an ammeter by connecting a low resistance (shunt) of value 1 Ω in parallel to the galvanometer, S . If full-scale deflection current of the galvanometer is 10 m A , then the maximum current that can be measured by the ammeter is -

Options

  1. A500 m A
  2. B510 m A
  3. C610 m A
  4. D490 m A

Correct answer

B. 510 m A

Step-by-step solution

S = G I g I – I g Shunt and Galvnometer are in parallel combination 1 = 50 × 10 I – 10 I - 1 0 = 500 I = 510 m A

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