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地球磁场与条形磁铁的磁场相似,其主要特点有三:(1)地磁场的 N 极在地球南极附近,S 极在地球北极附近,磁感线分布如图1所示.(2)在地面上方,地磁场的水平分量总是从地球南极指向北极,而竖直分量则南北相反,在南半球垂直地面向上,在北半球垂直地面向下.(3)在赤道正上方.距离地球表面相等的各点,磁感应强度的大小相等,其方向水平向北.学习掌握上述有关地磁场的基础知识并不难,难的是分
The magnetic field of the Earth’s magnetic field is similar to that of a bar-shaped magnet. Its main features are as follows: (1) The N pole of the geomagnetic field is near the south pole of the Earth and the S pole is near the north pole of the Earth. The magnetic line distribution is shown in Figure 1. (2) Above, the horizontal component of the Earth’s magnetic field always points from the south pole of the Earth to the north pole, while the vertical component goes north to south, vertically upwards in the southern hemisphere and vertically downwards in the northern hemisphere. (3) Right above the equator, Point, the same size of the magnetic flux density, the direction of horizontal north. Learning to master the basic knowledge of the geomagnetic field is not difficult, the difficulty is