我拿着一个指南针在家里到处跑,却无可奈何地看到,无论我怎样跑,手中的指南针都固执地将指针指向它认准的方向——南。我横跑、竖跑、斜跑,累得满头大汗、气喘吁吁,想让它别指向南,可它仍然“意志坚定”。正在我一筹莫展的时候,爸爸笑着告诉我:磁场会使指南针的指针转动,使指南针偏离正南方向。家里没有磁铁,怎么才能有磁场呢?爸爸又告诉我:导线通电时,周围会产生磁场。我惊奇地问:“导线通电,周围产生磁场,就会使指南针偏离正南方向?”爸爸鼓励我说:“自己动手试试看嘛!” I took a compass to run around the house, but reluctantly saw, no matter how I ran, the hands of the compass are stubbornly pointing the pointer in the direction it is looking - South. I ran, jumped, shifted, tired and sweating, gasping, trying not to point south, but it was still “determined.” While I was out of my pants, my dad laughed and told me that the magnetic field will rotate the compass's pointer so that the compass deviates from the south. No magnet at home, how can we have a magnetic field? Dad told me: When the wire is energized, there will be a magnetic field around. I asked in surprise: “When the wire is energized and a magnetic field is generated around it, the compass will deviate from the south.” Dad encouraged me to say, “Try it yourself!”