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[单选题]
对于位移电流，有下述四种说法，请指出哪一种说法正确？（）
A
位移电流是由变化电场产生的
B
位移电流是由线性变化磁场产生的
C
位移电流的热效应服从焦耳-楞次定律
D
位移电流的磁效应不服从安培环路定理
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参考答案
试题答案：
A
答案解释：
位移电流是由变化电场产生的。
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