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MHT CET202211 Aug 2022Morning ShiftPhysicsCurrent ElectricityActual

A galvanometer of resistance G can be converted into a voltmeter of range V by connecting a resistance R in series with it. The series resistance required to change its range to V 3 is

Options

  1. AR-3 G 4
  2. BR+G 3
  3. CR-G 2
  4. DR-2 G 3

Correct answer

D. R-2 G 3

Step-by-step solution

Case-1 aligned & R= V I_G -G & I_G= V R+G aligned Case-2: R^ = ( V 3 ) I_G -G= ( V 3 ) ( V R+G ) -G= ( R-2 G 3 )

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