A Spherically Symmetric Charge Distribution?
Suppose that the electric field in the Earth's atmosphere is E = 8.20 101 N/C, pointing downward. Determine the electric charge in the Earth. (Assume E is measured at the Earth's surface.)
What sign must Earth's charge have if the electric field around it points downward everywhere?
- RealProLv 72 months ago
What's the equation for strength of the gravitational field on the surface of a spherically symmetric mass distribution?
g = GM/r^2
Do you feel Coulomb copied Newton's work?
E = k |Q| /r^2
|Q| = E r^2 / k
r = 6.37×10^6 m
Of course you know Q is negative. For explanation, search "why do field lines of a negative charge point inward"