A moving coil galvanometre has a resistance of 10 ohm and produces a full scale deflection for a current of 20mA ? how can the instrument be adoted to measure voltage upto 120V current upto 20A Share with your friends Share 0 Vaibhav T. answered this Dear Student, Rm=10 ohmIm=20 mA(1) For V=120 VRseries=VIm-RmRseries=12020×10-3-10Rseries=5.99 kilo-ohm(2) For I=20 ARshunt=ImRmI-ImRshunt=20×10-3×1020-20×10-3Rshunt=0.219.98=0.01 ohm 1 View Full Answer
