A total electric charge of 3.5nC is distributed uniformly over the surface of a

Question

A total electric charge of 3.5nC is distributed uniformly over the surface of a metal sphere with a radius of 24cm. If the potential is zero at a point at infinity, find the value of the parental at the distances 48cm, 24cm, 12cm. At 48 I got 66V. At 24 and 12 I got 130V.
I need to find, What is the magnitude and direction of the electrc field just outside the surface of the metal sphere. A total electric charge of 3.5nC is distributed uniformly over the surface of a metal sphere with a radius of 24cm. If the potential is zero at a point at infinity, find the value of the parental at the distances 48cm, 24cm, 12cm. At 48 I got 66V. At 24 and 12 I got 130V.
I need to find, What is the magnitude and direction of the electrc field just outside the surface of the metal sphere. At 48 I got 66V. At 24 and 12 I got 130V.
I need to find, What is the magnitude and direction of the electrc field just outside the surface of the metal sphere.

Explanation / Answer

apply the formula for Eelctric field E = KQ/r^2

wjhere K is 9e9

Q is charge = 3.5 e-9 C

r is the raidus of sphere = 0.24 m

so

Electric ffield E = 9e9 * 3.5 e-9/(0.24*0.24)

E = 546.875 N/C ----------------<<<<<<<<<<<<Answer

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