Physics Unit22: Electromagnetic Waves (id: 82887006d)

本题目来源于试卷: Physics Unit22: Electromagnetic Waves，类别为 通用国际物理

[单选题]
An electric field is p - s4;w:5c3a/hmv pod dfd*qosuht,x(roduc9qbzn 50 o4s9yp .,dja7wskqg ed by a

A. constant magnetic field.
B. changing magnetic field.
C. either a constant or a changing magnetic field.
D. none of the given answers


参考答案:  B


本题详细解析: 暂无

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