When a current of 5   mA is passed through a galvanometer having a coil of resistance 15   Ω …

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:
  1. 4.005×103 Ω
  2. 1.985×103 Ω
  3. 2.045×103 Ω
  4. 2.535×103 Ω

Solution

∆V=IgRg+RH

10=5×10-3x+15

x=1.985×103 Ω

Asked in: JEE Main 2017 (02 Apr)

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