Tag Archive for Tag: Correcting Observed Bearings

Tag: Correcting Observed Bearings Local Attraction

A freely suspended and properly balanced magnetic needle is expected to show magnetic meridian. However, local objects like electric wires and objects of steel attract magnetic needle towards themselves. Thus, needle is forced to show slightly different direction. This disturbance is called local attraction. The list of materials which cause local attraction are: (i) magnetic rock or iron ore, (ii)

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