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純電阻電路是指電路中只有電能和內能的轉換如:電阻、小燈泡. 非純電阻電路是指除了電能和內能的轉換還有其他能量的轉換,如電動機,電風扇. 初中所學電路如果沒有特殊說明都是純電阻電路 W=UIt P=UI I=U/R Q=I^2Rt適用於任何電路 W=U^2/Rt W=I^2Rt P=I^2R P=U^2R只適用於純電阻電路 公式不全,我只記起了這些,
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