9. [-/2 Points] DETAILS MY NOTES SERPSE10 22.4.0P.014. ASK YOUR TEACHER PRACTICE ANOTHER (a) Three point charges are located on the circumference of a circle of radius r, at the angles shown in the figure. What is the electric field at the center of the circle due to these point charges? (Express your answer in vector form. Use thi following as necessary: ke, g,andr.) (b) What If? What is the minimum electric field magnitude that could be obtained at the center of the circle by moving one or more of the charges along the circle, with a minimum separation of 4.70 between each of the charges? Express your resuli as the ratio of this new electric field magnitude to the magnitude of the electric field found in part (a). Eminimum 'l E .- part (a) Need Help? Submit Answer 10. [-/4 Points] DETAILS MY NOTES SERPSE10 22.4.0P.016. ASK YOUR TEACHER PRACTICE ANOTHER Three charged particles are at the corners of an equilateral triangle as shown in the figure below. (Let = 2.00 pC, and L =0.650 m.) y 7.00 pC 60.0 = x q 4.00uC @ (a) Calculate the electric field at the position of charge g due to the 7.00-pC and 4.00-pC charges. kN/CT + kN/C j | / | kN/C (b) Use your answer to part (a) to determine the force on charge g. g mN T+ mN . - |