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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 0.1V, the number of divisions on its scale is 

(A) 90 

(B) 91 

(C) 100 

(D) none 

1 Answer

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by (70.0k points)
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Best answer

Correct option (C) 100

Explanation:

Total voltage (V0) = i(r + R) 

= 10(90 + 910) mV = 10 V 

∴ Number of divisions

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