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Certain galvanometers have a fixed core made of non magnetic metallic material. The function of this metallic material is

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To bring the coil to rest quickly

To make the magnetic field radial

To oscillate the coil in magnetic field for longer period of time

To produce large deflecting torque on the coil

answer is B.

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Detailed Solution

Due to motion of the coil eddy current develops thus bringing the coil to rest quickly

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