At the earth’s surface there is a measurable electric field of 150 N/C that is directed...
At the earth’s surface there is a measurable electric field of
150 N/C that is directed
down (towards the center of the earth). This implies that the solid
part of the planet
(from the surface to the core) has a net electric charge. Assuming
that earth is a
conductor, calculate (a) the sign of this charge (+ or –), (b) the
surface charge
density, (c) the total surface charge of the earth and (c) the
number of elementary
charges that this corresponds to. If the entire planet is
electrically neutral, what
must be the sign and number of elementary charges located in the
earth’s upper
atmosphere? The radius of earth is R = 6.37x106 m.
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