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2017年九年级第一轮物理总复习教学案2017年12月11日/UploadFiles/nopic.gif
(三十一)从指南针到磁浮列车
<span class="MsoNormal" lang="EN-US" p
(三十一)从指南针到磁浮列车
<span class="MsoNormal" lang="EN-US" p="" span="" style="font-family:宋体;mso-ascii-font-family:"man"ont-family:
"man"
1
、具有能吸引
、
、
等物质的性质叫磁性。任何磁体都有两个磁极,分别叫
(
)和
(
),它们相互作用规律为
【内容简介】
(三十一)从指南针到磁浮列车
(三十一)从指南针到磁浮列车
<span class="MsoNormal" lang="EN-US" p="" span="" style="font-family:宋体;mso-ascii-font下载地址1|xa/2017/12/201712111630135506.doc<p align="center" class="MsoNormal" style="text-align:center;line-height:21.0pt;
mso-line-height-rule:exactly;tab-stops:182.4pt">
<b>
<span style="font-size:16.0pt;
font-family:宋体">(三十一)从指南针到磁浮列车</span>
</b>
<b>
<span class="MsoNormal" lang="EN-US" p="" span="" style="font-family:宋体;mso-ascii-font-family:"man"ont-family:
"man"<n lang="> </span>
</b>
</p>
<p class="MsoNormal" style="text-indent:19.5pt;line-height:16.0pt;mso-line-height-rule:
exactly">
<span lang="EN-US">1</span>
<span style="font-family:宋体;mso-ascii-font-family:"man"ont-family:
"man"nt-weight:bold">、具有能吸引</span>
<u>
<span lang="EN-US"> </span>
</u>
<span style="font-family:宋体;mso-ascii-font-family:"man"ont-family:
"man"nt-weight:bold">、</span>
<u>
<span lang="EN-US"> </span>
</u>
<span style="font-family:宋体;mso-ascii-font-family:"man"-font-family:"man"nt-weight:bold">、</span>
<u>
<span lang="EN-US"> </span>
</u>
<span style="font-family:
宋体;mso-ascii-font-family:"man"ont-family:"man"font-weight:bold">等物质的性质叫磁性。任何磁体都有两个磁极,分别叫</span>
<u>
<span lang="EN-US"> </span>
</u>
<span style="font-family:宋体;mso-ascii-font-family:"man"-font-family:"man"nt-weight:bold">(</span>
<span lang="EN-US"> </span>
<span style="font-family:宋体;
mso-ascii-font-family:"man"ont-family:"man"font-weight:bold">)和</span>
<u>
<span lang="EN-US"> </span>
</u>
<span style="font-family:宋体;mso-ascii-font-family:"man"ont-family:
"man"nt-weight:bold">(</span>
<span lang="EN-US"> </span>
<span style="font-family:宋体;mso-ascii-font-family:"man"ont-family:
"man"nt-weight:bold">),它们相互作用规律为</span>
<u>
<span lang="EN-US"> </span>
</u>
<span style="font-family:宋体;mso-ascii-font-family:"man"-font-family:"man"nt-weight:bold">。</span>
<span lang="EN-US"> </span>
</p>
<p class="MsoNormal" style="text-indent:19.5pt;line-height:16.0pt;mso-line-height-rule:
exactly">
<span lang="EN-US">2</span>
<span style="font-family:宋体;mso-ascii-font-family:"man"ont-family:
"man"nt-weight:bold">、磁体周围存在一种物质叫</span>
<u>
<span lang="EN-US"> </span>
</u>
<span style="font-family:
宋体;mso-ascii-font-family:"man"ont-family:"man"font-weight:bold">。</span>
<span style="font-family:宋体;mso-bidi-font-weight:
bold">在磁体外部,磁感线总是从<u><span lang="EN-US"> </span></u>发出,最后回到<u><span lang="EN-US"> </span></u>;磁感线分布越<u><span lang="EN-US"> </span></u>的地方,其磁场越强。<span lang="EN-US"> </span></span>
</p>
<p class="MsoNormal" style="line-height:16.0pt;mso-line-height-rule:exactly">
<b>
<span style="font-family:宋体">(二)电流的磁场(电生磁)<span lang="EN-US"> </span></span>
</b>
</p>
<p class="MsoNormal" style="text-indent:19.5pt;line-height:16.0pt;mso-line-height-rule:
exactly">
<span lang="EN-US" style="font-family:宋体;mso-bidi-font-weight:bold">1</span>
<span style="font-family:宋体;mso-bidi-font-weight:bold">、揭示电能生磁的是丹麦物理学家<u><span lang="EN-US"> </span></u>,其实验说明了<u><span lang="EN-US"> </span></u>。<span lang="EN-US"> </span></span>
</p>
<p class="MsoNormal" style="text-indent:19.5pt;line-height:16.0pt;mso-line-height-rule:
exactly">
<span lang="EN-US" style="font-family:宋体;mso-bidi-font-weight:bold">2</span>
<span style="font-family:宋体;mso-bidi-font-weight:bold">、通电螺线管周围的磁场与<u><span lang="EN-US"> </span></u>周围相似。<span lang="EN-US"> </span></span>
</p>
<p class="MsoNormal" style="line-height:16.0pt;mso-line-height-rule:exactly">
<b>
<span style="font-family:宋体">(三)科学探究:电动机为什么会转动<span lang="EN-US"> </span></span>
</b>
</p>
<p class="MsoNormal" style="text-indent:19.5pt;line-height:16.0pt;mso-line-height-rule:
exactly">
<span lang="EN-US" style="font-family:宋体;mso-bidi-font-weight:bold">1</span>
<span style="font-family:宋体;mso-bidi-font-weight:bold">、电动机的制造原理<u><span lang="EN-US"> </span></u>,实现了<u><span lang="EN-US"> </span></u>能转化为<u><span lang="EN-US"> </span></u>能。<span lang="EN-US"> </span></span>
</p>
<p class="MsoNormal" style="text-indent:19.5pt;line-height:16.0pt;mso-line-height-rule:
exactly">
<span lang="EN-US" style="font-family:宋体;mso-bidi-font-weight:bold">2</span>
<span style="font-family:宋体;mso-bidi-font-weight:bold">、通电导体在磁场中所受磁力方向与<u><span lang="EN-US"> </span></u>和<u><span lang="EN-US"> </span></u>有关。<span lang="EN-US"> </span></span>
</p>
<p class="MsoNormal" style="line-height:16.0pt;mso-line-height-rule:exactly">
<span style="mso-bidi-font-size:10.5pt;font-family:黑体;mso-hansi-font-family:宋体;
mso-bidi-font-weight:bold">三、基础练评及中考演练</span>
<span lang="EN-US" style="font-family:
黑体;mso-hansi-font-family:宋体;mso-bidi-font-weight:bold"> </span>
</p>
<p class="MsoNormal" style="text-indent:19.5pt;line-height:18.0pt;mso-line-height-rule:
exactly"> </p>
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<p><!--[endif]--> <span lang="EN-US">1</span><span style="mso-bidi-font-size:10.5pt;font-family:宋体">.</span><span style="font-family:宋体;mso-ascii-font-family:"man"ont-family:
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<p>.......</p>
<div>
<span style="font-family:宋体;mso-ascii-font-family:"man"ont-family:
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