Question on: JAMB Physics - 2020
A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are
0\(^o\) and 0\(^o\)
60\(^o\) and 60\(^o\)
90\(^o\) and 90\(^o\)
90\(^o\) and 0\(^o\)
Here's the breakdown:
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At the Earth's North Magnetic Pole: The magnetic field lines of the Earth are vertical, pointing downwards. When a magnetic needle is suspended at this location, it aligns itself with the magnetic field. Therefore, the angle between the needle and the horizontal is 90 degrees.
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At the Magnetic Equator: The magnetic field lines of the Earth are horizontal. At the magnetic equator, a freely suspended magnetic needle aligns itself horizontally. Hence, the angle between the needle and the horizontal is 0 degrees.
Therefore, the respective angles are 90° and 0°.
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