Explain the Importance of the Radial Magnetic Field in a Moving Coil Galvanometer

The radial magnetic field is applied to a moving coil galvanometer to produce a constant torque on the coil. It is applied to measure the relation between the current and the angle which is non-linear such that the current cannot be measured easily. With the help of the radial magnetic field, the angle between the plane of the coil and the magnetic field is maintained zero in all the orientation of the coil.

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