A Galvanometer is an instrument that can be used to construct an ammeter for measuring…

A Galvanometer is an instrument that can be used to construct an ammeter for measuring current .It can be used converted to a voltmeter. It can also be used as a multimeter. In all cases resistance must be connected to galvanometer either in series or in parallel to effect the change .To turn into an ammeter a low resistance in parallel of suitable value and to convert to a voltmeter a resistance in series is connected to the galvanometer. You are given a galvanometer for which a current of 10 mA is required for full deflection .The internal resistance of the galvanometer is 100 ohm. Then answer the following questions.
To double the full scale voltage reading of any galvanometer turned into a voltmeter, you must
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