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人教版普通高中课程标准《物理》选修3-2第四章“电磁感应”第四节“法拉第电磁感应定律”中有这样一道练习题:当航天飞机在环绕地球的轨道上飞行时,从中释放一颗卫星,卫星与航天飞机保持相对静止,两者用导电缆绳相连,这种卫星称为绳系卫星,利用它可以进行多种科学实验。现有一颗绳系卫星在地球赤道上空沿东西方向运行,卫星位于航天飞机正上方,它与航天飞机间的距离是20.5 km,卫星所在位置的地磁场为B
PEP ordinary high school curriculum standard “physics” elective 3-2 fourth chapter “electromagnetic induction ” section IV “Faraday’s law of electromagnetic induction ” there is such an exercise: When the space shuttle in the orbit around the Earth During flight, a satellite is released from it. The satellites and space shuttle remain relatively still. Both are connected by conductive cables. The satellites are called tethered satellites and can be used for a variety of scientific experiments. A tethered satellite is currently operating in the east-west direction over the Earth’s equator. The satellite is located directly above the space shuttle with a distance of 20.5 km from the space shuttle and a geomagnetic field at the satellite’s position B