Let, consider a galvanometer having an internal resistance of 60 O. When the galvanometer is being employed as an ammeter (without extra resistance) it deflects full scale if it carries a current of 0.5 mA. You wish for to use the similar galvanometer as a voltmeter by joining it via a series resistor to voltage source. A 1.0 V source generates full scale deflection of the meter. Determine the value of the series resistor?