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MHT CET20192 May 2019Morning ShiftPhysicsCurrent ElectricityActual

A galvanometer has resistance of 100 Ω and a current of 10 m A produces full scale deflection in it. The resistance to be connected to it in series, to get a voltmeter of range 50 v o l t , is

Options

  1. A3900 Ω
  2. B4000 Ω
  3. C4600 Ω
  4. D4900 Ω

Correct answer

D. 4900 Ω

Step-by-step solution

G = 100 Ω , i g = 10 m A Range of voltmeter = i g G + R 50 = 10 × 10 - 3 100 + R R = 4900 Ω

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