Question

Suppose that earth has a surface charge density of 1 electron/metre^2?. Calculate earth's

potential and electric field just outside earth's surface. Radius of earth 6400 km.​

Answer 1

Answer:

Explanation:Consider earth as a big conducting sphere with σ=−1.6×10  

−19

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  Cm  

−2

 

potential of a conducting sphere=kσ4πR

=9⋅10  

9

×−1.6⋅10  

−19

×4π×6400⋅10  

3

 

≈−0.12V