In: Other
A shunt-type ohmmeter uses a 2 mA basic d'Arsonval movement with an internal resistance of 25 Ω. The battery emf is 1.5 V.
Calculate:-
(a) Value of the resistor in series with the battery to adjust the Full Scale Deflection (FSD)
(b) At what point (percentage) of full-scale will 100 Q be marked on the scale?
Rx = unknown resistance R1 = scale adjusting resistance E = omf of intemal battery Rm= PMMC meter resistance S = switch EI
When resistance taken infinite in first bit,by making it open ckt ,I applied kvl in first loop which passes same current I1 through R1 and meter.