A moving coil galvanometer has a resistance of 900 Ω. In order to send only 10% of the main current through this galvanometer, what is the resistance of the required shunt?

100Ω 10Ω 1Ω 1000Ω

100Ω

Shunt resistance, S = IgG/Is  where Ig = Galvanometer current, G = Galvanometer resistance and  Is = Current sensitivity