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電阻可作為電熱原件,把電能轉化為內能,是通過原子間對電子阻力所產生的電容是不連接的兩塊極板,用來儲存電荷,並放出電荷,把電能轉化為電場能.電杆是螺線圈,通過變化電流在螺線圈內產生變化磁場,而其要阻礙通過磁通量…
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