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Solution


Q.

Certain galvanometers have a fixed core made of non-magnetic metallic material. The function of this metallic material is          [2023]
1 to make the magnetic field radial  
2 to bring the coil to rest quickly  
3 to produce large deflecting torque on the coil  
4 to oscillate the coil in magnetic field for longer period of time  

Ans.

(2)

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