Fields D.2 Electromagnetic Fields & Potential (id: de70e19e8)

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

[单选题]
The diagram shows the equipotential surfa xfj4zl+yd t)xp5a8 4uces of two chargesm a8p*; ws-c4 t6dd +tusmti*r.

Which of the following can be the directions of the electric field at points A and B?

A. Direction at point A is ↑ ; Direction at point B is ↑
B. Direction at point A is ↑ ; Direction at point B is ↓
C. Direction at point A is ← ; Direction at point B is ←
D. Direction at point A is ← ; Direction at point B is →


参考答案:  A


本题详细解析:

Explanation​:

The pattern of equipotential surfaces belongs to two like charges. That indicates that field direction at points A and B should be in the same direction. Additionally, field lines and equipotential surfaces are at right angles to each other. The only answer that satisfies these conditions is A. Therefore, the answer is A.

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