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[题目]:据报道,1992年7月,美国“阿特兰蒂斯”号航天飞机进行了一颗卫星悬绳发电实验,实验取得了部分成功。航天飞机在地球赤道上空离地面3000km处由东向西飞行,相对地面的速度大约6.5×10~3m/s,从航天飞机上向地心方向发射一颗卫星,携带一根长20km,电阻是800Ω的金属悬绳,使这根悬绳与地磁场垂直,作切割磁感线运动,假定这一范围内的地磁场是均匀的,磁感应强度为4×10~(-5)T,且认为悬绳上各点的切割速度和航天飞机速度相同,根据理论设计,通过电离层(由等离子体组成)的作用,悬绳可产生约3A的感应电流,试求:
[Subject]: According to reports, in July 1992, the US space shuttle Atlantis carried out a satellite suspension rope experiment and the experiment was partially successful. The space shuttle flies from east to west at a distance of 3,000 km above the Earth’s equator and the speed relative to the ground is about 6.5×10~3m/s. A satellite is launched from the space shuttle to the center of the earth and carries a 20-km-long electric resistance. The 800 ohm metal suspension rope makes this suspension rope perpendicular to the earth’s magnetic field and performs cutting magnetic induction line motion. Assuming that the geomagnetic field in this range is uniform, the magnetic induction intensity is 4*10~(-5)T, and it is considered that The cutting speed at each point on the suspension rope is the same as that of the space shuttle. According to the theoretical design, the suspended rope can generate an induced current of about 3A through the action of the ionosphere (composed of plasma). Try to: