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Magnetism And Matter — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsMagnetism And Matter1 Mark
Question
Answer the following questions regarding earth’s magnetism:
Geologists claim that besides the main magnetic N-S poles, there are several local poles on the earth’s surface oriented in different directions. How is such a thing possible at all?
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Answer

The earth's field is only approximately a dipole field. Local north-south poles may arise due to, for instance, magnetised mineral deposits found on the surface of the earth.

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