Question

A tangent galvanometer of reduction factor $IA$ is placed with plane of its coil perpendicular to the magnetic meridian when a current of $IA$ is passed through it. The deflection produced is

• A. ${45}^o$
• B. $0$
• C. ${30}^o$
• D. ${60}^o$

Answer 1

Answer: (B)

$0$

Since the coil is perpendicular to the magnetic meridian on passing the current in clockwise direction the needle makes $0^{\circ }$ and if the current direction is anticlockwise then needle makes ${180}^{\circ }$. Here, the needle is perpendicular to the magnetic meridian hence, there will be no deflection i.e. deflection will be zero.