如图所示,甲是两条通电直导线,乙是研究自感现象的实验电路图,

如图所示,甲是两条通电直导线,乙是研究自感现象的实验电路图,丙是欧姆表的内部电路图,丁图是电磁灶的原理图,下列说法正确的是(       

A.甲图两直导线通以同方向的电流,它们将相互排斥

B.乙图电路通电稳定后又断开开关瞬间,灯泡A中的电流方向向左

C.丙图在测量电阻前,需两表笔短接,调节R1使指针指向0Ω

D.丁图是利用电磁感应引起涡流的原理来工作的

答案

BCD

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