Q.

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

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a

To bring the coil to rest quickly

b

To make the magnetic field radial

c

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

d

To produce large deflecting torque on the coil

answer is B.

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Detailed Solution

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

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