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Question 11: NCERT Solutions for 12th Class Physics: Chapter 5-Magnetism and Matter

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Question 11: NCERT Solutions for 12th Class Physics: Chapter 5-Magnetism and Matter

At a certain location in Africa, a compass points 12° west of the geographic north. The north tip of the magnetic needle of a dip circle placed in the plane of magnetic meridian points 60° above the horizontal. The horizontal component of the earth’s field is measured to be 0.16 G. Specify the direction and magnitude of the earth’s field at the location.

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  1. Solution:

    Compass needle points 12° west of geographical north, hence angle of declination 0 is 12° west. North tip of magnetic needle is 60° above horizontal, hence the location is in southern hemisphere and angle of dip is 60°. Magnitude of net magnetic field can be calculated as

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    NCERT Solutions for 12th Class Physics: Chapter 5-Magnetism and Matter