如图所示,用力将线圈abcd匀速拉出匀强磁场,下列说法正确的是  A

如图所示,用力将线圈abcd匀速拉出匀强磁场,下列说法正确的是

  A.拉力所做的功等于线圈所产生的热量

  B.当速度一定时,线圈电阻越大,所需拉力越小

  C.对同一线圈,消耗的功率与运动速度成正比

  D.在拉出全过程中,导线横截面所通过的电量与快拉、慢拉无关   

 

答案

ABD

解析:略

 

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