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D1-SCT48: THREE CHARGES IN A LINE- ELECTRIC FIELD Shown are two cases where three charges are placed in a row. Three students are Case A comparing the electric field that exerts a force on the middle charge in the diagrams. Adrianna: All three charges contribute by the principle of superposition. So the field is going to be greatest in case A since the contributions due to the three charges will be greatest. I- Case B Brandon:I think its a bogus question. The field at that point is undefined because there is a charge there. I dont think thats right. The field that exerts a force on the middle charge is the field due to the other two charges because a charge cannot feel it own field. Since those other two charges dont change,L the field acting on the middle charge is the same in both cases. Catalina: With which of these students do you agree? Brandon CatalinaNone of them Explain your reasoning.

Please explain how you came to your answer.

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