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1、2019中考专题复习十八：电磁转换 电磁波与能源可持续发展DIV.MyFav_1210817849429 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1210817849429 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; FONT-FAMI
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14、ifyDIV.MyFav_1210817849429 LI.aTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; FONT-FAMILY: 宋体; TEXT-ALIGN: justifyDIV.MyFav_1210817849429 DIV.aTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; FONT-FAMILY: 宋体; TEXT-AL
15、IGN: justifyDIV.MyFav_1210817849429 DIV.Section1page: Section1DIV.MyFav_1210817849429 OLMARGIN-BOTTOM: 0cmDIV.MyFav_1210817849429 ULMARGIN-BOTTOM: 0cm一、选择题（选择一个正确答案，共15题，每题2分，计30分）1如图1所示，当弹簧测力计吊着一个磁体，沿水平方向从水平放置的条形磁铁的A端移到B端的过程中，能表示测力计示数与水平位置关系的是图1中的（ ）图1A B C D2在一根条形磁铁附近平行放置一根与磁铁形状完全相同的棒状物体XY后，其周围磁场磁
16、感线的分布情况如图2-甲所示。将XY两端对调以后，磁感线分布情况未发生改变，如图2-乙所示，则棒状物体XY可能是（ ）A软铁棒B铜棒C条形磁铁，其中X端为N极D条形磁铁，其中Y端为N极3如图3所示，在“山”字型铁芯的B端绕有一通电线圈，则它的磁极位置（ ）AA端为N极，C端为S极BA端为极C端为N极CA、C两端均为N极，B端为S极DC端均为S极，B端为N极4如图4所示，一条形磁铁的周围放着能自由转动的小磁什甲、乙、丙、丁，这四根磁针静止时N极指向画错的是（磁针的黑端表示N极）（ ）A磁针甲B磁针乙C磁针丙D磁针丁5下列器材中没有用到磁性材料的是（ ）A录音机中使用的录音带B计算机中的存储软盘C计算机中的存储硬盘DCD、VCD、DVD播放器中使用的光碟6关于磁感线，
