A basic d'A isonal movement with internal resister , Rm=10 Ohm and full-scale current, Ifsd=1 mA is to be converted into a multi range direct current voltmeter with voltage ranges of 0-100 volt , 0-200 volt and 0-500 volt the circuit of Fig. 1 is to be used for this voltmeter . design and calculate the multiplier resister.