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July 5, 2015

Homework Help: Physics

Posted by jason on Thursday, February 16, 2012 at 2:37pm.

About 5.12 x 104 m above Earth's surface, the atmosphere is sufficiently ionized that it behaves as a conductor. The Earth and the ionosphere form a giant spherical capacitor, with the lower atmosphere acting as a leaky dielectric. Find the capacitance C of the Earth-ionosphere system by treating it as a parallel plate capacitor.

The fair-weather electric field is about 150 V/m, downward. How much energy is stored in this capacitor?

Due to radioactivity and cosmic rays, some air molecules are ionized even in fair weather. The resistivity of air is roughly 3.00 ◊ 1014 ?∑ m. Find the resistance of the lower atmosphere that flows between the Earth's surface and the ionosphere.

Calculate total current that flows between the Earth's surface and the ionosphere.

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