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

Question

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,

MARKS App · Accepted Answer

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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