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A galvanometer coil has a resistance 90 Ω and full-scale deflection current 10 mA . A 910 Ω resistance is connected in series with the galvanometer to make a voltmeter. If the least count of the voltmeter is 0 . 1 V , the number of divisions on its scale is

Correct answer

100

Step-by-step solution

V max = I max R g + R s = 1 0 × 1 0 - 3 1 0 0 0 = 1 0 V L.C. = 0.1 V N L.C. = V max ⇒ N = 1 0 0.1 = 1 0 0

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