A galvanometer having a coil resistance of 100 Ω gives a full scale deflection, when a current of 1 mA is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of 10 A , is:

Step-by-step solution

As shown in figure a shunt resistance S is connected parallel to the galvanometer to convert it into an ammeter. Let G is the resistance of the galvanometer. Where G   =   100   Ω and full-scale deflection current is I g   =   10   m A   =   10 × 10 - 3   A For galvanometer V g   =   I g   G   =   10 × 10 - 3   × 10   =   0 . 1   v o l t From the figure, the shunt is parallel to galvanometer ∴ V S &#1