Z11-02-10. 两根长直导线通有电流I, 图示有三种环路,在每种情况<img src="https://static.zxtiku.com/wangke/imgs/topic/3407b9f5f6404264a154c44101bcfc70.jpg"/>等于: ___(环路a )、___(环路b )、 ___(环路c ) 。<img src="https://static.zxtiku.com/wangke/imgs/topic/ac83d5ccebfcd430299a88f5e2749731.jpg"/> Z11-02-10图 A. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/9a5b401884e8af3e6ab59276c595fa18.jpg"/>；0；<img src="https://static.zxtiku.com/wangke/imgs/topic/9a5b401884e8af3e6ab59276c595fa18.jpg"/>； B. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/9a5b401884e8af3e6ab59276c595fa18.jpg"/>；<img src="https://static.zxtiku.com/wangke/imgs/topic/9a5b401884e8af3e6ab59276c595fa18.jpg"/>；0； C. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/9a5b401884e8af3e6ab59276c595fa18.jpg"/>；0；<img src="https://static.zxtiku.com/wangke/imgs/topic/b28b3a8e2b6744d7e63b13444a24c20a.jpg"/>； D. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/b28b3a8e2b6744d7e63b13444a24c20a.jpg"/>；0；<img src="https://static.zxtiku.com/wangke/imgs/topic/9a5b401884e8af3e6ab59276c595fa18.jpg"/>；