复龙镇2022―2022学年度上期九年级期末检测物理试题(含参考答案).pdf

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1、最大最全最精的教育资源网新世纪教育网天量课件、教案、试卷、学案免费下载第 1 页 共 9 页学校姓名班级准考证号装订线复龙镇 20132014 学年度上期九年级期末 检测物理试题(考试时间:90分钟满分 100分分)一、选择题(每题 2分,共 30 分)每题只有一个正确答案,请将正确答案番号填入括号内1.5 月 31 日是“世界无烟日”,吸烟有害健康已成为同学们的共识,会议室里贴了如图1 所示的标志,这主要是考虑到在空气不流通的房间里,只要有一个人吸烟,整个房间就会充满烟味,这是因为()A分子在不停地运动B分子间有引力C分子间有斥力D物质是由分子组成的2.关于温度、内能和热量,下列说法正确的是

2、()A物体的内能越多,放热一定越多B温度相同的物体,其内能一定相等C物体的内能增加,一定要吸收热量D晶体熔化时温度不变,其内能一定增加3炎热的盛夏,人站在水中时感觉凉爽,而当人赤脚走在沙土上时却感到烫脚这主要是因为水和沙具有不同的()A热量B质量C比热容D密度4在四冲程汽油机工作过程中,将内能转化成机械能的冲程是()A吸气冲程B压缩冲程C做功冲程D排气冲程5 现有 A、B、C 三个轻质小球已知A 带负电,A 和 B 互相吸引,C 和 A 互相排斥,则()AB 一定不带电,C 带正电BB 可能带正电,C 带正电CB 一定带正电,C 带负电DB 可能不带电,C 带负电6以下用品中,在通常情况下属于

3、导体的是()A塑料刻度尺B橡胶轮胎C绘画橡皮D食盐水7下列四个电路中,电流表能测量通过灯L1电流的是()ABCD8测量电压的仪表是()A电流表B电压表C.电能表D电阻箱9图 2 所示电路中,甲、乙两处分别接入电流表或电压表,当S闭合后,为使两灯均能发光,则()A甲接电压表,乙接电流表B甲、乙均接电压表题号一二三四五总分得分图 1 图 2 最大最全最精的教育资源网新世纪教育网天量课件、教案、试卷、学案免费下载第 2 页 共 9 页C甲、乙均接电流表D甲接电流表,乙接电压表10在探究串联电路电压关系实验中,物理实验小组按如图3 所示的电路测得V 的示数是3.8V,V1的示数是2.3V,V2的示数应

4、为()A1.5V B3.8V C2.3V D6.1V 11关于导体的电阻,下列说法正确的是()A导体的电阻与导体两端的电压成正比B导体的电阻与通过导体的电流成反比C导体两端电压为零时,导体的电阻也为零D导体的电阻与电流、电压大小无关12下列各组应用中,不属于滑动变阻器的是()A调台灯亮度的装置B调收音机音量大小的电位器C调收音机频道的装置D调节电动车速度的装置13.当将滑动变阻器的滑片P 向右移动时下图中的哪一种连接方法可使变阻器连入电路部分的电阻增大()A B C D 14如图 4 所示,将滑动变阻器滑片P从某一位置移动到另一位置,则电压表的示数由8V 变为 6V,电流表示数相应由0.4A

5、变为 0.6A 那么定值电阻R0的电功率改变量为(不计温度对电阻的影响,电源电压保持不变)()A12W B 8W C4W D2W 15如图 5 所示,将两个电阻R1和 R2串联在电路上,通电后两根相同的火柴被点燃,若R15R2,先点燃火柴的是()A电阻 R1 B电阻 R2CR1、R2同时被点燃 D无法判定。二、不定项选择题:下列各小题均有四个选项,其中至少有一个符合题意。(共 15 分,每小题3 分。错选、多选不得分,选不全的得2 分)16.关于温度、内能和热量,下列说法正确的是()A温度越高的物体所含的热量一定越多B温度相同的两个物体间不会发生热传递C的冰变成的水温度不变,内能不变D任何物体

6、都具有内能通过摩擦可增大冰块的内能17.某混合动力型汽车的动力装置由汽油发动机和电动机组成。一般情况下,蓄电池为电动机供电,由电动机提供动力;当需要较大动力时,由汽油发动机和电动机共同提供动力;当汽车制动减速时,电动机还可作为发电机为蓄电池充电。关于该车动力装置在工作时的能量转化情况,以下分析正确的是()A.汽油发动机做功冲程把内能转化为机械能B.电动机在提供动力时把电能转化为机械能图 3 图 4 图 5 图 6 文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR

7、10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8

8、V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 H

9、A3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2

10、Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 Z

11、I6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N

12、1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文

13、档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9最大最全最精的教育资源网新世纪教育网天量课件、教案、试卷、学案免费下载第 3 页 共 9 页C.发电机为蓄电池充电时把电能转化为化学能D.制动减速发电的过程中把内能转化为电能18.如图 6 所示,当开关S闭合后,下列说法正确的是()A.灯与灯是串联,且灯被短路B.电压表可测出灯两端的电压C.电流表测的是灯的电流D.电流表测的是灯的电流19.关于电功

14、、电功率和电热,以下说法正确的是()A电流通过导体所做的功越多,导体消耗的电能就越多 B用电器上标明的额定电功率越大,其消耗的电能就一定越多 C额定电功率越大的用电器,正常工作的时间越长,消耗的电能就一定越多 D用电器消耗的电能越多,用电器上产生的电热(热量)就一定越多20.标有“220V 500W”的电热器和电风扇均在额定电压下工作,则下列说法正确的是()A1s 内电流通过它们做的功都是500J B相同时间消耗的电能一样多C相同时间内电热器产生的热量多D相同时间内电流通过电热器做功多三、填空题(每空1 分共 25 分)21“稻花香里说丰年,听取蛙声一片”,作者闻到“稻花香”属于现象;两滴水银

15、靠近时,能自动结合成一滴较大的水银,这一事实说明分子之间存在着力,酒精和水混合后,总体积减小,这一现象直接说明分子间有。22淘气的小明把图钉按在铅笔的一段,手握铅笔让图钉冒在课桌上来回摩擦几下后,发现图钉冒变烫了,这是用的方法改变了物体的内能;把瓶装水放在冰箱里,一会儿变凉了,这是用的方法改变了物体的内能。23建筑工地上有一台大型汽车吊,把 100t 建筑材料从地面吊到15m 高处,汽车吊做的有用功为J,在这过程中,汽车吊消耗柴油的质量为2.0kg,则完全燃烧2.0kg 柴油释放的内能为J,该过程中汽车吊的效率为%。(柴油的热值为q=4.3 107J/kg,取 g=10N/kg)24物理学中,

16、把毛皮摩擦过的橡胶棒上所带的电规定为电荷(选填“正”或“负”);把(选填“正”或“负”)电荷定向移动的方向规定为电流的方向。25原子是由和电子组成的,检验物体是否带电要用到仪器,电荷的定向移动形成。26最简单的电路由、用电器、开关和导线四部分组成;家庭电路中的电冰箱、电视机、电灯等用电器的连接方式是联;我国家庭照明电路的电压为V。27如图 7 电路中,R1=10、R2=20,开关闭合后,电压表示数为6,则 A1的示数是 _A,A2的示数是 _A。5min R1消耗的电能_J;R2的电功率是 _W。28某导体两端加2V 电压时,通过的电流为05A,则这段导体的电阻为_要使通过该导体的电流变为1A

17、,应在该导体两端加_V 电压。当该导体两端的电压为3V 时,该导体所消耗的电功率为_W。图 7文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文

18、档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR

19、10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8

20、V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 H

21、A3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2

22、Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 Z

23、I6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9最大最全最精的教育资源网新世纪教育网天量课件、教案、试卷、学案免费下载第

24、4 页 共 9 页29 将电阻R1、R2以某种方式接入某一电路中,R1、R2两端电压之比是2:3,则R1:R2=,将它们以另一种方式接入电路时,R1的功率是6W,则R2的功率是W。四、实验与探究(共20 分)30在“测定小灯泡电功率”的实验中小灯泡的额定电压为2.5V 灯丝电阻约为8(10 分)(1)某同学连接的电路如图8 所示,请指出其中的两次错误或不妥:(4 分)_;_。(2)将上述错误或不妥改正后闭合开关,如果发现灯泡发出特别耀眼的光,且此时电流表、电压表都有示数,则出现该现象的原因可能是_。(2 分)(3)实验时,调节滑动变阻器,当电压表的示数为_V 时,灯泡正常发光,此时电流表示数如

25、图9 所示,读数为 _A,该灯泡的额定功率为_W。(4)该实验还可以测定小灯泡的电阻,根据以上实验数据,这个小灯泡正常工作时的电阻为_。31小雷想知道小灯的亮暗程度与什么因素有关。于是找来额定电流均小于0.6 A,额定电压是 2.5V 的灯 L1和额定电压是3.8V 的灯 L2,先后接在电源电压恒为6V 的电路中,按照如图 10 所示的电路开始探究。(1)请你用笔画线代替导线,根据图10 所示的电路图,将图11 所示实物图连接完整。(2 分)(2)若小雷连接Eg 路后闭合开关,灯L1几乎不发光,移动滑片P 也不能改变灯的亮度。原因是他把滑动变阻器的_、_(选填“AB”或“CD”)接线柱接入了电

26、路。图 8 图 9 图 10 图 11 文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J

27、9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V

28、10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4

29、Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码

30、:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J

31、1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R

32、3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9最大最全最精的教育资源网新世纪教育网天量课件、教案、试卷、学案免费下载第 5 页 共 9 页(3)小雷排除故障后,按图11 所示

33、的电路继续进行实验:闭合开关,滑片P 向_(选填“A或“B)端移动,使灯L1发光,测出灯L1的相关物理量,记录和计算结果如下表:次数电压 V实际功率W电阻 116O20O 32800225O24O 601O.42328O26O 731O 77请将记录数据时遗漏的物理量和单位填出表格的空格处。(4)小雷注意到灯L1的亮度变化是:第二次比第一次亮,第三次比第二次更亮。结合表中数据得出的结论是小灯泡越亮,它的实际功率越_。(5)用 L2替换 L1重复上面的实验时,需要改变_表的量程,发现灯L2的亮度变化规律与灯 L1相似。(6)小雷在实验结束后与同学们讨论:有同学认为“用上表中灯L1的 3 次电阻的

34、平均值代表它的电阻更准确。这种说法错误的原因是小雷忽略了_对小灯电阻的影响。有同学认为“把灯L1换成定值电阻,该实验可以用来研究导体中的电流与电压的关系。你认为这种说法_(选填“正确”或“错误”)。五、应用题:(要求写出必要的文字说明、计算公式和过程)(共 16 分)32.如图所示,是某鱼缸水温凋节器的原理图,其中R1为阻值可调的电热丝,开关S2为单刀双掷开关开关S1闭合 S2接 b 时,电路处于加热状态;当开关S1断开、S2接 a时,电路处于保温状态已知U=220V,R2=600,R2不会短路取水的比热容c=4.2 103 J/(kg?)试问:(1)当电路处于加热状态时,通过电阻R2的电流为

35、多少?(2)当电路处于保温状态时,若电路消耗的功率P=48.4W,则电热丝R1连人电路的阻值应为多少?(3)当电路处于加热状态时,要将缸中m=48.4 kg 的水温度升高t=2.0,现调节电热丝R1使其阻值为=200,则加热需多少时间?(假设电热全部被水吸收,且无热量散失)文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N

36、1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文

37、档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR

38、10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8

39、V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 H

40、A3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2

41、Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 Z

42、I6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9最大最全最精的教育资源网新世纪教育网天量课件、教案、试卷、学案免费下载第 6 页 共 9 页33如图所示,电源电压恒定不变,R2的阻值为8?,小灯泡L 上标有“6V 3W”字样,小灯泡电阻不随温度改变。若闭合S1、S2,断开S3,小灯泡刚好正常发光,此时电压表的示数为 3V,那么:(1)小灯泡 L 的电阻为多大?(2)电压电压为多少?(3)R1电阻为多大?(4)若闭合S1、S3,断开 S2,并移动滑动变阻器R 的滑片,滑动变阻器接入电路的电阻为多大时,电路的总功率最大。这个最大的功率等于多

43、少?20132014学年度上学期九年级物理期末测试题参考答案一、选择题。(每题 2 分,共 30 分)1、A 2、D 3、C 4、C 5、D 6、D 7、D 8、B 9、D 10、A 11、D 12、C 13、A 14、D 15、A 二、不定项选择题:下列各小题均有四个选项,其中至少有一个符合题意。(共 15 分,每小题 3 分。错选、多选不得分,选不全的得2 分)16.BD 17.ABC 18.BD 19.AC 20.ABC三、填空题。(每空 1 分,共 25 分)21、扩散,引,间隙22、做功,热传递;L S2R1S3V R2RS1文档编码:CR10J1P8V8R3 HA3T3H2Q9J9

44、 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V1

45、0N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y

46、9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:

47、CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1

48、P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3 HA3T3H2Q9J9 ZI6V10N1Z4Y9文档编码:CR10J1P8V8R3

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