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Q.
A moving coil galvanometer can be converted into an ammeter by
Moving Charges and Magnetism
Solution:
To utilise a galvanometer $(G)$ as ammeter, there is the difficulty in measurement of current due to the sensitivity of galvanometer and also connection of galvanometer with a very large resistance in series that may change the value of current in the circuit. To overcome these difficulties one attaches a small resistance $r_{s}$ called shunt resistance in parallel with the galvanometer coil as shown in the figure
