A galvanometer can be converted into an ammeter by connecting

Options

A. introducing a shunt resistance of large value in series.
B. introducing a shunt resistance of small value in parallel.
C. introducing a resistance of small value in series.
D. introducing a resistance of large value in parallel.

Answer

B

Explanation

To utilise a galvanometer (G) as ammeter, there is the difficulty in measurnment 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.