14. The Earth and its ionosphere can be considered good conductors under certain conditions, thus forming a system of a conducting spherical shell (the ionosphere) and a conducting sphere (the Earth)....

14. The Earth and its ionosphere can be considered good conductors under certain conditions, thus forming a system of a conducting spherical shell (the ionosphere) and a conducting sphere (the Earth). Compute the capacitance of this huge spherical capacitor. Earth's mean radius is 6370 km. The ionosphere is a region of the upper atmosphere, which begins from about 80 km altitude. The dielectric filling of this capacitor is air, obviously