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[" 27.A galvanometer has a coil of resis...

[" 27.A galvanometer has a coil of resistance "100Omega],[" and gives a full scale deflection for "30mA],[" current.If it is to work as a voltmeter of "30V],[" range,the resistance required to be added will "],[" be "],[[" (a) "900Omega," (b) "1800Omega],[" (c) "500Omega," (d) "1000Omega]]

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