【正文】 目 錄第一章 直流電路 ...................................................................................................................................5167。1—1 電學的基本物理量 ...................................................................................................................5一、電量 ............................................................................................................................................5二、電流 ............................................................................................................................................5三、電壓 ............................................................................................................................................6四、電動勢、電源 ............................................................................................................................7五、電阻 ............................................................................................................................................7六、電功、電功率 ............................................................................................................................8七、電流的熱效應 ..........................................................................................................................10167。1—2 電 路 .....................................................................................................................................11一、電路的組成和作用 ..................................................................................................................11二、電路圖 ......................................................................................................................................11三、電路的三種狀態(tài) ......................................................................................................................12167。1—3 歐姆定律 .................................................................................................................................12一、一段電阻電路的歐姆定律 ......................................................................................................12二、全電路歐姆定律 ......................................................................................................................13167。1—4 電阻的串聯(lián)、并聯(lián)電路 .........................................................................................................14一、電阻的串聯(lián)電路 ......................................................................................................................14二、電阻的并聯(lián)電路 ......................................................................................................................16167。1—5 電工測量基本知識 .................................................................................................................17一、萬用表的外形及基本組成 ......................................................................................................18二、萬用表的使用步驟 ..................................................................................................................20三、萬用表的使用注意事項 ..........................................................................................................20習 題 ..............................................................................................................................................20第二章 電磁的基本知識 .....................................................................................................................22167。2—1 磁的基本知識 .........................................................................................................................22一、磁現(xiàn)象 ......................................................................................................................................22二、磁場、磁感應線 ......................................................................................................................22三、磁通、磁感應強度 ..................................................................................................................23四、磁導率 ......................................................................................................................................24167。2—2 電流的磁場 .............................................................................................................................25一、通電直導線的磁場 ..................................................................................................................25二、通電螺線管的磁場 ..................................................................................................................25三、磁場對載流直導線的作用 ......................................................................................................26四、磁場對通電線圈的作用 ..........................................................................................................27167。2—3 電磁感應 .................................................................................................................................27一、電磁感應現(xiàn)象 ..........................................................................................................................27二、法拉第定律 ..............................................................................................................................29三、楞次定律 ..................................................................................................................................29四、電磁感應定律 ..........................................................................................................................31167。2—4 自感、互感 .............................................................................................................................31一、自感 ..........................................................................................................................................31二、互感 ..........................................................................................................................................32習 題 ...................................................................................................................