一根载有恒定电流的长直导线穿过载有恒定电流的金属圆环中心,且

一根载有恒定电流的长直导线穿过载有恒定电流的金属圆环中心,且垂直于环面,导线和环中的电流方向如图A-5所示,则这条直导线和金属环间作用力为_______,这是因为______________________.

答案


0;环形电流的磁场方向与直线电流方向平行
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