# What is the reduction factor of galvanometer . The amount of of current required to produce $45^{\circ}$ deflection in a galvanometer is defined as it reduction factor.
$\begin{array}{1 1} \text{Amount of current required to produce$90^{\circ}$deflection } \\ \text{Amount of current required to produce$0^{\circ}$deflection} \\ \text{Amount of current required to produce$45^{\circ}$deflection} \\ \text{Amount of current required to produce$30^{\circ}$} \end{array}$
Answer : $\text{Amount of current required to produce$45^{\circ}$deflection}$