Question

1. Assume that earth has a surface charge density of 1 electron per

metre2

. Calculate the earth’s electric field.

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Answer 1

(1) -0.115 V

Explanation:

Let R = 6.4 × 106 m

σ = surface charge density

Total charge on the surface of earth = q

Then, the potential V at a point on the earth’s surface is same as if the entire charge q were concentrated as its centre. Thus

Explanation:

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