MHT CET Physics question

A small cylindrical soft iron piece is kept in a galvanometer so that [MP PMT 2001]

(A)A radial uniform magnetic field is produced
(B)A uniform magnetic field is produced
(C)There is a steady deflection of the coil
(D)All of theseCorrect

Answer: (D)

Solution

The soft iron core makes the field in the gap radial and of the same magnitude everywhere along the coil's path, so the torque on the coil is the same at

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Question ID VK-078732