A galvanometer with full-scale deflection of 10 mA is to be converted to a voltmeter…

A galvanometer with full-scale deflection of 10 mA is to be converted to a voltmeter with full-scale deflection of 5v. the resistance of the galvanometer is
  • A.
    1Ω
  • B.
    2Ω
  • C.
    5Ω
  • D.
    10Ω
Correct Answer: Option D
Explanation

R = (Vg)/lg = G, where lg = current through galvanometer
R = resistance of the multiplier
G = resistance of the galvanometer
∴ G = (vg-R)/lg 5(1000/10) – 490 = 500 -490 = 10Ω

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