Question

FIGURE 15-1 shown in Fig. 15-1, a point charge of +Q is placed at the centroid of an equilateral triangle. When a is the magnitude of the force that acts on the center charge due to a third charge of +Q placed at one of the other vertices? e of +Q is placed at one of the triangles vertices, an electrostatic force of 4.0 N acts on it. What A) zero B) 16 N C) 20N D) 8.0N 4.0 N

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Answer #1

For equilateral triangle center is equidistant from each vertices.

Let, length of each sides of equivalent triangle =l

1st charge Q is placed at the centroid of the triangle. Lengf氏of each Anden a. at thve pfaseal at Foree the center charre ane to Rnd Change L N xchange dneん3rd change pfaeed at B во 3 0° ん

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