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MHT CET Medical202623 April 2026Evening ShiftPhysicsCurrent ElectricityActual

A galvanometer having a coil resistance of 100 gives a full scale deflection when a current of 1 mA is passed through it. The value of the resistance which can convert this galvanometer into ammeter giving a full scale deflection of 10 A, is nearly

Options

  1. A3
  2. B2
  3. C0.1
  4. D0.01

Correct answer

D. 0.01

Step-by-step solution

Given R_g = 100 , I_g = 1 mA = 10⁻³ A , and I = 10 A . To convert a galvanometer into an ammeter, a shunt resistance S is connected in parallel with it. The value of the shunt resistance is given by S = I_g R_g I - I_g . Substituting the given values: S = 10⁻³ 100 10 - 10⁻³ S = 0.1 9.999 S 0.01 Answer: 0.01

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