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MHT CET202611 April 2026Morning ShiftPhysicsCurrent ElectricityActual

A galvanometer has a current range of 10 mA and a voltage range of 0.75 V. To convert this galvanometer into an ammeter of range 10 A, what is the shunt resistance?

Options

  1. A100 999
  2. B50 999
  3. C200 999
  4. D75 999

Correct answer

D. 75 999

Step-by-step solution

Given I_g = 10 mA = 0.01 A and V_g = 0.75 V . Resistance of the galvanometer is G = V_g I_g = 0.75 0.01 = 75 , . To convert the galvanometer into an ammeter of range I = 10 A , a shunt resistance S is connected in parallel. The value of the shunt resistance is given by S = I_g G I - I_g = V_g I - I_g . Substituting the values, we get S = 0.75 10 - 0.01 = 0.75 9.99 = 75 999 , . Answer: 75 999

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