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A galvanometer with full-scale deflection of 10 mA is to be converted to a voltm...


Question

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

Options

A) 1Ω

B) 2Ω

C) 5Ω

D) 10Ω


The correct answer is 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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Discussion (3)

  • The answer is 2 ohms and the value for the multiplier resistance is not given

  • Tonia Of God

    The Question is incomplete
    RG was not given in the question.

    Where did you get the RG you used In solving the Question from?

  • 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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