Q86 / 90 · JEE Main 2017 (02 Apr) · Physics

When a current of  5 mA is passed through a galvanometer having a coil of resistance 15 Ω, it shows full-scale deflection. The value of the resistance to be put in series with the galvanometer to convert it into a voltmeter of range 0-10 V is:

  • A
    4.005×103 Ω
  • Correct answer
    B
    1.985×103 Ω
  • C
    2.045×103 Ω
  • D
    2.535×103 Ω

Solution

∆V=IgRg+RH

10=5×10-3x+15

x=1.985×103 Ω

Hence, the correct answer is option: 'B'.

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