Three identical point charges of charge q = 4.7 ?C are placed at the vertices (c

Question

Three identical point charges of charge q = 4.7 ?C are placed at the vertices (corners) of an equilateral triangle. If the side of triangle is a = 4.8m, what is the magnitude, in N/C, of the electric field at the point P in one of the sides of the triangle midway between two of the charges?

Three identical point charges of charge q = 4.7 ?C are placed at the vertices (corners) of an equilateral triangle. If the side of triangle is a = 4.8m, what is the magnitude, in N/C, of the electric field at the point P in one of the sides of the triangle midway between two of the charges?

Explanation / Answer

as two oposite charges cancel each other fields ,

only the oposite charge has elctric field at the midpoint

then ,

d = 1.732* 4.8/2 = 4.16 m

then

Electic field = 9*10^9*4.7*10^-6/4.16^2

Electic field =2448 N/C

electric field at the point P in one of the sides of the triangle midway between two of the charges is 2448 N/C

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