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Why field magnet is concave in galvanometer and function of soft iron core at centre?

April 26, 2017concave field function galvanometer iron magnet Mathematics Physics soft

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Why field magnet is concave in galvanometer and function of soft iron core at centre?

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In a moving coil galvanometer, the soft iron core increases the strength of the magnetic field. The radial magnetic field is for producing effective torque.

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the magnet is concave to provide uniform magnetic field where all lines of force are parallel. Soft iron core is dielectric. When placed at the centre, the magnetic torque is increased.