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1、电与磁单元测试题二(参考答案)DIV.MyFav_1311227609730 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1311227609730 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: Times New
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9、 0cm 0cm 0pt; FONT-FAMILY: 宋体; TEXT-ALIGN: justifyDIV.MyFav_1311227609730 SPAN.CharFONT-FAMILY: 宋体DIV.MyFav_1311227609730 DIV.Section1page: Section1DIV.MyFav_1311227609730 OLMARGIN-BOTTOM: 0cmDIV.MyFav_1311227609730 ULMARGIN-BOTTOM: 0cm一、选择题1D 2 AC 3C 4C 5C 6D 7C 8B 9D 10A 11BC 12D 13B 14B二、填空题15南极;地磁场16洗衣机(或电风扇);机械能17磁场;对调电源两极(或对调磁体的两极)18电流越大,电磁铁的磁性越强,吸引大头针的数目越多。19BC、DE20N;正21电磁感应, 电动22会;在通电螺线管周围会产生磁场,它的插入或拔出就相当于线圈在磁场中切割磁感线运动,而产生感应电流三、作图题四、探究与实验2718U228(1)甲(2)(3) 改变电流的方向或磁极的方向;机械能
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