A) decrease by \[30{}^\circ \]
B) decrease by \[15{}^\circ \]
C) increase by \[15{}^\circ \]
D) increase by \[30{}^\circ \]
E) None of these
Correct Answer: B
Solution :
In tangent galvanometer, \[i\propto \tan \theta \] \[\therefore \] \[\frac{{{i}_{1}}}{{{i}_{2}}}=\frac{\tan {{\theta }_{1}}}{\tan {{\theta }_{2}}}\] \[\frac{{{i}_{1}}}{{{i}_{1}}/\sqrt{3}}=\frac{\tan 45{}^\circ }{\tan {{\theta }_{2}}}\] \[\sqrt{3}\tan {{\theta }_{2}}=1\] \[\tan {{\theta }_{2}}=\frac{1}{\sqrt{3}}\] \[{{\theta }_{2}}=30{}^\circ \]
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