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  4. In moving coil galvanometer, strong horse shoe magnet of concave shaped pole pieces is used to

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Q. In moving coil galvanometer, strong horse shoe magnet of concave shaped pole pieces is used to

MHT CETMHT CET 2019Moving Charges and Magnetism

Solution:

The horseshoe magnet has cylindrically concave pole-pieces. Due to its shape the magnet produces radial magnetic field, so that when the coil rotates in any position its plane is always parallel to the direction of the magnetic field. This has been shown in the figure given below.
image