【单项选择题】
如图所示,平板电容器(忽略边缘效应)充电时,沿环路L<sub>1</sub>、L<sub>2</sub>磁场强度H的环流中,必有()<br /> <img src="https://img.ppkao.com/2019-04/wuacheng/2019043017160598009.jpg" /><br /> <img src="https://img.ppkao.com/2019-04/wuacheng/2019043017161949672.jpg" /><p> 如图所示,平板电容器(忽略边缘效应)充电时,沿环路L<sub>1</sub>、L<sub>2</sub>磁场强度H的环流中,必有()<br /> <img src="https://img.ppkao.com/2019-04/wuacheng/2019043017160598009.jpg" /><br /> <img src="https://img.ppkao.com/2019-04/wuacheng/2019043017161949672.jpg" /></p>
A、A.A
B、B.B
C、C.C
D、D.D