Question

A galvanometer coil has a resistance of 15 Ω and the metre shows full scale deflection for a current of 4 mA. How will you convert the metre into an ammeter of range 0 to 6 A?

Answer 1

Resistance of the galvanometer coil, G = 15 Ω
Current for which the galvanometer shows full scale deflection,

Range of the ammeter is 0, which needs to be converted to 6 A. Current, I = 6 A

Hence, a shunt resistor is to be connected in parallel with the galvanometer.