A galvanometer has a coil of resistance ...

A galvanometer has a coil of resistance `100 Omega` and gives a full-scale deflection for `30 mA` current. If it is to work as a voltmeter of `30 V` range, the resistance required to be added will be

`500 Omega`

`900 Omega`

`1000 Omega`

`1800 Omega`

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