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The resistance of a galvanometer is 10 $Ω$ . It gives full-scale deflection when 1 mA current is passed. The resistance connected in series for converting it into a voltmeter of 2.5 V will be

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24.9Ω

249Ω

2490Ω

24900Ω

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detailed solution

Correct option is C

iG=VG+R ⇒10-3=2.510+R

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The resistance of a galvanometer is 10Ω. It gives full-scale deflection when 1 mA current is passed. The resistance connected in series for converting it into a voltmeter of 2.5 V will be

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The resistance of a galvanometer is 10 $Ω$ . It gives full-scale deflection when 1 mA current is passed. The resistance connected in series for converting it into a voltmeter of 2.5 V will be