Problem 8: The full scale deflection for a galvanometer is 10 mA. Its resistance is 100 Ω. How it can be converted into an ammeter of range 100 A.

Solution

Given data               I_g = 10 mA                      R_g = 100 ohm                     I = 100 A

Required                   R_s =?

Strategy: The ratio of the shunt resistance to galvanometer resistance is given by

Put the values