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MHT CET202014 Oct 2020Morning ShiftPhysicsCurrent ElectricityActual

When a resistance of 200 is connected in series with a galvanometer of resistance 'G' its range is ' V ^ . To triple its range, a resistance of 2000 is connected in series. The value of G is

Options

  1. A700
  2. B900
  3. C400
  4. D600

Correct answer

A. 700

Step-by-step solution

V₁= (R₁+G ) IV₂= (R₂+G ) I V₂ V₁ = R₂+G R₁+G 3= 2000+G 200+G 600+3 G=2000+G2 G=1400G=700

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