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上海市,宝山区,2020届九年级一模物理试题2020年01月15日/UploadFiles/nopic.gif
考生注意:1.本试卷物理部分含五个大题。2.答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸考生注意:1.本试卷物理部分含五个大题。2.答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答 题一律无效。一、选择题(共16分)下列各题均只有一个正确选项,请将正确选项的代号用2B铅笔填涂在答题纸的相应位置上,更改答案时,用橡皮擦去,重新填涂。1.历史上首先用实验测出大气压值的科学家是A.牛顿。 B.帕斯卡。 C.阿基米德。 D.托里拆利。2.下列各物理量中,可以用来鉴别物质的是A.质量。 B.重力。
【内容简介】考生注意:1.本试卷物理部分含五个大题。2.答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答 题一律无效。一、选择题(共16分)下列各题均只有一个正确选项,请将正确选项的代号用2B铅笔填涂在答题纸的相应位置上,更改答案时,用橡皮擦去,重新填涂。1.历史上首先用实验测出大气压值的科学家是A.牛顿。 B.帕斯卡。 C.阿基米德。 D.托里拆利。2.下列各物理量中,可以用来鉴别物质的是A.质量。 B.重力。 C.密度。 D.体积。3.下列现象或做法是为了增大压强的是A.医用针头针尖很细。 B.高架公路的桥板通常是空心的。C.图钉的钉帽面积较大。 D.大型载重卡车按有较多车轮。4.容器中的0 ℃冰块(如图1所示)遇热全部化成0 ℃水,发生变化的物理量是A.容器内物体的质量。B.容器内物体的体积。C.容器底部所受压力。D.容器底部所受压强。5.同一物体先后漂浮在甲、乙两种液体上(ρ甲< ρ乙),若受到的浮力分别为F甲、F乙,A.F甲一定小于F乙。 B.F甲一定等于F乙。C.F甲一定大于F乙。 D.F甲可能小于F乙。6.甲、乙是由同种材料制成且长度相等的两根导体,若将它们串联在同一通电的电路中,则下列关于甲、乙的横截面积S及加在甲、乙两端电压U的大小判断正确的是A.若S甲>S乙,则U甲=U乙 B.若S甲S乙,则U甲>U乙 D.若S甲U乙7.把同种材料制成的甲、乙两个正方体各自平放在水平地面上,甲、乙对地面的压强分别为和,若把甲叠放在乙上面,如图2所示,则乙对地面的压强为:A.p1+p2 B.p12+p22C. D.8.在图3所示的两电路中,电源电压相等且保持不变。闭合图3(a)中电键S1,将该图中滑动变阻器R3的滑片P从最左端移到最右端,发现电流表Al的最大示数是最小示数的3倍;再将图3(b)中滑动变阻器R3的滑片P移到最左端、将图3 (b)中滑动变阻器R3滑片P 移到最右端后,闭合电键和S2,发现电流表Al、A2的示数相同。下列关于电阻R1、R2和滑动变阻器最大阻值怂的大小关系正确的是A.R1∶R2∶R3 = 1∶2∶3 B.R1∶R2∶R3=3∶2∶1C.R1∶R2∶R3 = 1∶2∶2 D.R1∶R2∶R3=2∶2∶1二、填空题(共25分)请将结果填入答题纸的相应位置。考生注意:1.本试卷物理部分含五个大题。2.答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答           &#下载地址1|sj/2020/1/202011591613.docx<p style="margin-top:0;margin-right:11px;margin-bottom: 0;margin-left:13px;line-height:110%"><strong><span style="font-size:14px;line-height:110%;font-family:宋体">考生注意:</span></strong></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">1.</span><span style="font-size:14px;line-height: 110%;font-family:宋体">本试卷物理部分含五个大题。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">2.</span><span style="font-size:14px;line-height: 110%;font-family:宋体">答题时,考生务必按答题要求在答题纸规定的位置上作答,在草稿纸、本试卷上答</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> <img width="1px" height="1px" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" style="background:url(http://www.czwlzx.com/UEditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd" /></span><span style="font-size:14px;line-height:110%;font-family: 宋体">题一律无效。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><strong><span style="font-size: 14px;line-height:110%;font-family:宋体">一、选择题(共</span></strong><strong><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">16</span></strong><strong><span style="font-size:14px;line-height:110%;font-family:宋体">分)</span></strong></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:宋体">下列各题均只有一个正确选项,请将正确选项的代号用</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">2B</span><span style="font-size:14px;line-height: 110%;font-family:宋体">铅笔填涂在答题纸的相应位置上,更改答案时,用橡皮擦去,重新填涂。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">1</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.历史上首先用实验测出大气压值的科学家是</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">A</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.牛顿。</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> B</span><span style="font-size:14px;line-height:110%;font-family:宋体">.帕斯卡。</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> C</span><span style="font-size:14px;line-height:110%;font-family:宋体">.阿基米德。</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> D</span><span style="font-size:14px;line-height:110%;font-family:宋体">.托里拆利。</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"><img width="1px" height="1px" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" style="background:url(http://www.czwlzx.com/UEditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd" /></span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">2</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.下列各物理量中,可以用来鉴别物质的是</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">A</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.质量。</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> B</span><span style="font-size:14px;line-height:110%;font-family:宋体">.重力。</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> C</span><span style="font-size:14px;line-height:110%;font-family:宋体">.密度。</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> D</span><span style="font-size:14px;line-height:110%;font-family:宋体">.体积。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">3</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.下列现象或做法是为了增大压强的是</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">A</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.医用针头针尖很细。</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> B</span><span style="font-size:14px;line-height:110%;font-family:宋体">.高架公路的桥板通常是空心的。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">C</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.图钉的钉帽面积较大。</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> D</span><span style="font-size:14px;line-height:110%;font-family:宋体">.大型载重卡车按有较多车轮。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 29px;line-height:110%"><img width=" 106px" height=" 75px" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" style="background:url(http://www.czwlzx.com/UEditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd" /><span style="font-size:14px;line-height:110%;font-family: 'Times New Roman','serif'">4</span><span style="font-size:14px;line-height:110%;font-family:宋体">.容器中的</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">0 </span><span style="font-size:14px;line-height:110%;font-family:宋体">℃</span><span style="font-size:14px;line-height: 110%;font-family:宋体">冰块(如图</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">1</span><span style="font-size:14px;line-height: 110%;font-family:宋体">所示)遇热全部化成</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">0 </span><span style="font-size:14px;line-height: 110%;font-family:宋体">℃</span><span style="font-size: 14px;line-height:110%;font-family:宋体">水,发生变化的物理量是</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"></span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">A</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.容器内物体的质量。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">B</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.容器内物体的体积。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">C</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.容器底部所受压力。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">D</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.容器底部所受压强。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">5</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.同一物体先后漂浮在甲、乙两种液体上(</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">ρ</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">甲</span></sub><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">< ρ</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub><span style="font-size:14px;line-height:110%;font-family:宋体">),若受到的浮力分别为</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">F</span><sub><span style="font-size:14px;line-height:110%;font-family: 宋体">甲</span></sub><span style="font-size: 14px;line-height:110%;font-family:宋体">、</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">F</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub><span style="font-size:14px;line-height:110%;font-family:宋体">,</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">A</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">F</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">甲</span></sub><span style="font-size:14px;line-height:110%;font-family:宋体">一定小于</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">F</span><sub><span style="font-size:14px;line-height:110%;font-family: 宋体">乙</span></sub><span style="font-size: 14px;line-height:110%;font-family:宋体">。</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> B</span><span style="font-size:14px;line-height:110%;font-family:宋体">.</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">F</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">甲</span></sub><span style="font-size:14px;line-height: 110%;font-family:宋体">一定等于</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">F</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub><span style="font-size:14px;line-height:110%;font-family:宋体">。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">C</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">F</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">甲</span></sub><span style="font-size:14px;line-height:110%;font-family:宋体">一定大于</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">F</span><sub><span style="font-size:14px;line-height:110%;font-family: 宋体">乙</span></sub><span style="font-size: 14px;line-height:110%;font-family:宋体">。</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> D</span><span style="font-size:14px;line-height:110%;font-family:宋体">.</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">F</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">甲</span></sub><span style="font-size:14px;line-height: 110%;font-family:宋体">可能小于</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">F</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub><span style="font-size:14px;line-height:110%;font-family:宋体">。</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">6</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.甲、乙是由同种材料制成且长度相等的两根导体,若将它们串联在同一通电的电路中,则下列关于甲、乙的横截面积</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">S</span><span style="font-size:14px;line-height: 110%;font-family:宋体">及加在甲、乙两端电压</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">U</span><span style="font-size:14px;line-height: 110%;font-family:宋体">的大小判断正确的是</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">A</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.若</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">S</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">甲</span></sub><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">>S</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub><span style="font-size:14px;line-height:110%;font-family:宋体">,则</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">U</span><sub><span style="font-size:14px;line-height:110%;font-family: 宋体">甲</span></sub><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">=U</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> B</span><span style="font-size:14px;line-height:110%;font-family:宋体">.若</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">S</span><sub><span style="font-size:14px;line-height:110%;font-family: 宋体">甲</span></sub><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"><S</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub><span style="font-size:14px;line-height:110%;font-family:宋体">,则</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">U</span><sub><span style="font-size:14px;line-height:110%;font-family: 宋体">甲</span></sub><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">=U</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">C</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.若</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">S</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">甲</span></sub><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">>S</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub><span style="font-size:14px;line-height:110%;font-family:宋体">,则</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">U</span><sub><span style="font-size:14px;line-height:110%;font-family: 宋体">甲</span></sub><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">>U</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> D</span><span style="font-size:14px;line-height:110%;font-family:宋体">.若</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">S</span><sub><span style="font-size:14px;line-height:110%;font-family: 宋体">甲</span></sub><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"><S</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub><span style="font-size:14px;line-height:110%;font-family:宋体">,则</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">U</span><sub><span style="font-size:14px;line-height:110%;font-family: 宋体">甲</span></sub><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">>U</span><sub><span style="font-size:14px;line-height:110%;font-family:宋体">乙</span></sub></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 29px;line-height:110%"><img width=" 86px" height=" 81px" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" style="background:url(http://www.czwlzx.com/UEditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd" /><span style="font-size:14px;line-height:110%;font-family: 'Times New Roman','serif'">7</span><span style="font-size:14px;line-height:110%;font-family:宋体">.把同种材料制成的甲、乙两个正方体各自平放在水平地面上,甲、乙对地面的压强分别为和,若把甲叠放在乙上面,如图</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">2</span><span style="font-size:14px;line-height: 110%;font-family:宋体">所示,则乙对地面的压强为:</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">A</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">p<sub>1</sub>+p<sub>2</sub> B</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">p<sub>1</sub><sup>2</sup>+p<sub>2</sub><sup>2</sup></span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">C</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.</span><img width="51px" height="39px" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" style="background:url(http://www.czwlzx.com/UEditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd" /><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'"> D</span><span style="font-size: 14px;line-height:110%;font-family:宋体">.</span><img width="57px" height="44px" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" style="background:url(http://www.czwlzx.com/UEditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd" /></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">8</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.在图</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">3</span><span style="font-size:14px;line-height: 110%;font-family:宋体">所示的两电路中,电源电压相等且保持不变。闭合图</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">3</span><span style="font-size:14px;line-height: 110%;font-family:宋体">(</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">a</span><span style="font-size:14px;line-height: 110%;font-family:宋体">)中电键</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">S<sub>1</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">,将该图中滑动变阻器</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">R<sub>3</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">的滑片</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">P</span><span style="font-size:14px;line-height: 110%;font-family:宋体">从最左端移到最右端,发现电流表</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">A<sub>l</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">的最大示数是最小示数的</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">3</span><span style="font-size:14px;line-height: 110%;font-family:宋体">倍;再将图</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">3</span><span style="font-size:14px;line-height: 110%;font-family:宋体">(</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">b</span><span style="font-size:14px;line-height: 110%;font-family:宋体">)中滑动变阻器</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">R<sub>3</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">的滑片</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">P</span><span style="font-size:14px;line-height: 110%;font-family:宋体">移到最左端、将图</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">3 </span><span style="font-size:14px;line-height: 110%;font-family:宋体">(</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">b</span><span style="font-size:14px;line-height: 110%;font-family:宋体">)中滑动变阻器</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">R<sub>3</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">滑片</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">P </span><span style="font-size:14px;line-height: 110%;font-family:宋体">移到最右端后,闭合电键和</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">S<sub>2</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">,发现电流表</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">A<sub>l</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">、</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">A<sub>2</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">的示数相同。下列关于电阻</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">R<sub>1</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">、</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">R<sub>2</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">和滑动变阻器最大阻值怂的大小关系正确的是</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">A</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">R<sub>1</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">R<sub>2</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">R<sub>3</sub> = 1</span><span style="font-size: 14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">2</span><span style="font-size:14px;line-height: 110%;font-family:宋体">∶</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">3 B</span><span style="font-size:14px;line-height:110%;font-family:宋体">.</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">R<sub>1</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">R<sub>2</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">R<sub>3</sub>=3</span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">2</span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">1</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">C</span><span style="font-size:14px;line-height: 110%;font-family:宋体">.</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">R<sub>1</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">R<sub>2</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">R<sub>3</sub> = 1</span><span style="font-size: 14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">2</span><span style="font-size:14px;line-height: 110%;font-family:宋体">∶</span><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">2 D</span><span style="font-size:14px;line-height:110%;font-family:宋体">.</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">R<sub>1</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">R<sub>2</sub></span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">R<sub>3</sub>=2</span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">2</span><span style="font-size:14px;line-height:110%;font-family:宋体">∶</span><span style="font-size:14px;line-height: 110%;font-family:'Times New Roman','serif'">1</span></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><strong><span style="font-size: 14px;line-height:110%;font-family:宋体">二、填空题(共</span></strong><strong><span style="font-size:14px;line-height:110%;font-family:'Times New Roman','serif'">25</span></strong><strong><span style="font-size:14px;line-height:110%;font-family:宋体">分)</span></strong></p><p style="margin-bottom:0;margin-bottom:0;text-indent: 28px;line-height:110%"><span style="font-size:14px;line-height:110%;font-family:宋体">请将结果填入答题纸的相应位置。</span></p><p><br /></p>不限上海试题试卷免费docx
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