例1在地球表面的某位置,发现能自由转动的小磁针静止时沿竖直方向,且S极向下,则该位置是()A.地磁北极附近B.地磁南极附近C.赤道附近D.无法判断解析小磁针静止时受到地磁场的作用,根据磁极间相互作用规律,结合题中所述情景,小磁针S Example 1 At a point on the Earth’s surface, a small, freely rotating magnetic needle was found to be vertical at a standstill and with S-pole downwards, then (A). Near the geomagnetic north pole B. Near the geomagnetic south pole C. Near the equator D It can not be judged that when the small magnetic needle is static, it is affected by the geomagnetic field. According to the law of the interaction between the magnetic poles and the situation described in the title, the small magnetic needle S