Question

A multirange current meter can be constructed by using a galvanometer circuit as shown in Fig. 4.5. We want a current meter that can measure 10mA, 100mA and 1A using a galvanometer of resistance 10Ω and that prduces maximum deflection for current of 1mA. Find S₁, S₂ and S₃ that have to be used

Answer 1

gives S₁ = 1W, S₂ = 0.1W and S₃ = 0.01W