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Charge on Earth

Udit SIngh Asks:

“Does earth get charged? if it’s then where these
charge goes.”

Answer: The net charge of earth as a whole (including the atmosphere) is approximately zero. But the surface of earth(the solid part) has a net negative charge and the air blanket surrounding it has almost equal amount of positive charge. Due to this there exists an average electric field of 100 V/m near Earth’s surface.

The charge on earth is distributed on its surface only.

Please refer to the following links for further information.

There are some associated questions expected in relation to these. I hope that the readers will ask those in response to this post as comments so that the discussion can go on.

A Numerical from electrostatics

TIM posted:

Treat the sphere as a solid non-conducting sphere of radius R=6000 km with uniform charge Q=4000 C. The sphere has a conducting spherical shell. The shell has inner radius r1= 6005 km, outer radius r2= 6010 km and zero net charge. Assume gravity is negligible for all parts of this problem.
a) How much charge is on the inner and outer surfaces of the shell layer?
b) What is the potential difference deltaV between the base of the shell and the sphere?

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