Four Point Charges Are on the Rim of a Circle

question 57

Multiple Choice

Four point charges are on the rim of a circle of radius 10 cm.The charges are (in mC) +0.50,+1.5,-1.0,-0.50.If the electrical potential at the circle's center due to the +0.5 charge alone is 4.5 x 10⁴ V,what is the total potential at the center due to the four charges combined?

• A)18 x 10⁴ V
• B)4.5 x 10⁴ V
• C)zero
• D)-4.5 x 10⁴ V

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