A galvanometer having a coil resistance of 60 shows full scale deflection when a current of 1.0 A passes through it. It can be converted into an ammeter to read currents upto 5.0 ~A by

Step-by-step solution

Key Idea To convert a galvanometer to ammeter a small resistance is connected in parallel to the coil of the galvanometer. Here, aligned & G ₁=60 , I _ g =1.0 ~A , I =5 ~A & I _ g G ₁= ( I - I _ g ) S & S = I _ g G ₁ I - I _ g = 1 5-1 60=15 aligned Putting 15 resistance in parallel.