Fields D.2 Electromagnetic Fields & Potential (id: 3ed19a698)

本题目来源于试卷: Fields D.2 Electromagnetic Fields & Potential，类别为 IB物理学

[单选题]
Four point charges are placaqs;-hnf/g( g::u wknfvy5n ( e3+zg wt.oy jig1ziuhf1/ ucv*+op +3ud as shown on the corners of a square. Charges of +2Q and −Q, and unknown charges h+upuz*3gz.fc1yg w i+i otou 13/jv+A and B are located as shown on the diagram.

At the center of the square, the total potential is zero, but the resultant electric field is not zero.
Which of the following is a possible combination for the charges A and B?

A. A is +2Q ; B is -3Q
B. A is +2Q ; B is -Q
C. A is -Q ; B is +2Q
D. A is +2Q ; B is +Q


参考答案:  A


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