A galvanometer having a coil resistance 100   Ω gives a full scale deflection when a current of 1…

A galvanometer having a coil resistance 100 Ω gives a full scale deflection when a current of 1mA is passed through it. What is the value of the resistance which can convert this galvanometer into a voltmeter given full scale deflection for a potential difference of 10V?
  1. 10kΩ
  2. 8.9 kΩ
  3. 7.9 kΩ
  4. 9.9 kΩ

Solution

Vg=igRg=0.1V
V=10V
R=RgVVg-1
=100×99=9.9KΩ

Asked in: JEE Main 2020 (08 Jan Shift 2)

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