A dip circle is taken to geomagnetic equator. The needle is allowed to move in a vertical plane perpendicular to the magnetic meridian.
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A dip circle is taken to geomagnetic equator. The needle is allowed to move in a vertical plane perpendicular to the magnetic meridian. The needle will stay vertical direction because the horizontal component BHis perpendicular to this plane and hence does not take part in rotating the needle. The needle is aligned with the Vertical componene By.
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the needle remains in any direction of release
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