Three identical point particles that have charge q are at the vertices of an equ

Question

Three identical point particles that have charge qare at the vertices of an equilateral triangle that iscircumscribed by a circle of radius a that lies in thez = 0 plane and is centered at the origin. The values ofq and a are +2.50 Cand 60.6 cm, respectively. (Assume thepotential is zero very far from all charges.) a.) What is the electric potential at the origin?
kV b.)(b) What is the electric potential at the point on thez axis at z = a?
kV c.)(c) How would your answers to Parts (a) and (b) change ifthe charges were still on the circle but one is no longer at avertex of the triangle? Explain your answer.
3 Three identical point particles that have charge qare at the vertices of an equilateral triangle that iscircumscribed by a circle of radius a that lies in thez = 0 plane and is centered at the origin. The values ofq and a are +2.50 Cand 60.6 cm, respectively. (Assume thepotential is zero very far from all charges.) a.) What is the electric potential at the origin?
kV b.)(b) What is the electric potential at the point on thez axis at z = a?
kV c.)(c) How would your answers to Parts (a) and (b) change ifthe charges were still on the circle but one is no longer at avertex of the triangle? Explain your answer.
3

Explanation / Answer

            =1.11*105V = 111kV

(b)Electric potential on teh z-axis at z = a is isVz =(3)(9*109Nm2/C2)(2.5*10-6C)/[(2)(60.6*10-2m)]                = 0.785*105V    = 78.5kV
(c) Answer does not change since the charges are atequidistant from the z-axis.

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