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1、.学习.资料.初中物理电学围题一选择题共12 小题1标有“4V 0.25A 的小灯泡和“20 1A的滑动变阻器连接在如以下图的电路中电源电压为6V，电流表量程为“0 0.6A，电压表量程为“03V为确保电路平安，闭合开关时，滑动变阻器接入电路的阻值变化围应控制在A0 8B8 16C1 5 20D以上答案都不对2标有“2V 0.5A字样的小灯泡和标有“20 1A 字样的滑动变阻器，连接在如以下图的电路中，其电源电压为6V，电流表的量程为“0O.6A，电压表的量程为“03V闭合开关，在不损坏用电器的前提下，移动滑动变阻器滑片，电流表、电压表示数的围是AO.25A 0.6A，1V2V B O.3A
2、O.5A，1V1.5V C O.25A 0.5A，1.5V2V DO.25A0.5A，1V2V 3 2021?模拟标有“2V 1W 字样的小灯泡和标有“20 1A字样的滑动变阻器，连接在如以下图的电路中，其中电源电压为6V闭合开关后，移动滑动变阻器滑片，那么电流表、电压表示数的围是A0.25A0.6A 1V2V B 0.3A0.5A 1V 1.5V C 0.25A0.5A 1.5V 2V D0.25A0.5A 1V2V 4如以下图电路，电源两端电压为20V 不变，用滑动变阻器调节灯泡两端的电压灯泡电阻为5不变，滑动变阻器的最大电阻为20，当滑动变阻器的滑片从a端移到 b 端的过程中，灯泡两端的
3、电压变化围是A20V4V B4V20V C8V20V D0V20V 5如以下图的电路，电源电压U=25V，灯泡的电阻是5，滑动变阻器的最大电阻是20，当滑动变阻器的滑片P从 a 点移动到 b 点的过程中，灯泡两端的电压变化围是|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 16 页.-.word.zlA025V B5V25V C05V D10V25V 6如以下图，电源电压为6V 不变，电压表用03V 量程，电流表用00.6A 量程，R1=6，滑动变阻器的阻值围为 0 20为了保证两表均不损坏，滑动变阻器能允接入电路的阻值围是A0 4B
4、2 4C4 6D0 67如以下图R0阻值，Rx未知，电源电压未知，以下图不能测出Rx阻值的是ABCD8电阻 R，根据图中电表的读数来求出Rx 的阻值，其中不能实现的图是ABCD9 2021?德化县二模小聪同学用控制变量法探究“电流与电阻的关系的实验中，当AB 两点的电阻由5 欧换成10 欧后，下一步的正确操作是A只将电池数增加1倍B 只将电池数减半C 移动滑动变阻器D无需任何操作10 2021?鼓楼区二模灯泡 A 和 B 的额定电压均为6V，小明同学通过实验测得它们的电流随电压变化的曲线如以下图|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2
5、页，共 16 页文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:
6、CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9
7、HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 Z
8、L5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编
9、码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F
10、9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1
11、 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2.-.word.zlA 当 A、B 串连接入电路，逐渐增大电源电压，A 灯先烧坏B 当 A、B 串连接入电路，逐渐增大电源电压，B 灯先烧坏C 当 A、B 并联接入电路，逐渐增大电源电压，A 灯先烧坏D当 A、B 并联接入电路，逐渐增大电源电压，B
12、 灯先烧坏11 2021?安溪县质检如以下图的电路中，电源电压保持不变闭合开关S，调节滑动变阻器的滑片，电压表V1的示数 U1与电流表的示数I 及电压表V2的示数 U2与电流表的示数I 的变化关系图象中，正确的选项是A.BCD二填空题共5 小题13如以下图，电源电压6V 保持不变，小灯泡标有“2.5V 0.3A字样，滑动变阻器的规格是“50 1A，电流表的量程应选择_ A，为了保证电路各元件都能平安使用，那么滑动变阻器连入电路的阻值至少是_ 14为测量待测电阻Rx阻值，小东设计了如以下图的电路，R0的阻值，且电源电压不变，在不改拆电路的情况下，她_ 测出 Rx的阻值填“能或“不能，其原因是_|
13、精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 16 页文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S
14、1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8
15、H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3
16、R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I
17、4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9
18、A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2
19、C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2.-.word.zl15 2021?三模如以下图的电路中，电源电压保持不变闭合开关S，当滑动变阻器的滑片P 向右移动时，电压表 V1的示数与电流表A
20、的示数的比值将_ 变小/不变/变大，电压表 V1示数的变化_ 大于/等于/小于电压表V2示数的变化17 2021?普陀区二模如以下图的电路中，电源电压恒定不变，R1=2R2，当 S1闭合、S2断开时，电压表和电流表示数分别U1和 I1；当 S1断开、S2闭合时，电压表和电流表示数分别U2和 I2，那么 U1与 I1的比值_ U2与 I2的比值，I1与 I2的比值_ 3 均选填“大于、“等于或“小于三解答题共2 小题18 2021?如图 1 所示电路，电源电压U0不变，初始时滑动变阻器的滑片P在最右端，但由于滑动变阻器某处发生断路，合上电键后滑片P 向左滑过一段距离后电流表才有读数且电压表读数U
21、 与 x、电流表读数I 与 x 的关系如图 2 所示，那么1根据图象可知：断点位置在x 等于_ cm 处，电源电压U0等于_ V；2电阻 R 等于多少欧姆？3从断点处滑片P 向左滑动的过程中，该滑动变阻器滑片P每滑动 1cm 的阻值变化为多少欧姆？该滑动变阻器电阻丝没有断路时的总电阻值是多少欧姆？|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页，共 16 页文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H
22、10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R
23、1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4
24、S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A
25、8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C
26、3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2
27、I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT
28、9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2.-.word.zl19 2021?江如图甲所示，是某型号汽车的自动测定油箱油量的电路原理图其中，电源的电压为12V，保护电阻 R0=5，A 为一个量程为00.6A 的电流表油量表，Rx 为压敏电阻厚度不计，其阻值Rx 随油量深度h 的变化关系如图乙所示；油箱的上、下两局部均为大小不同的圆柱形容器，上部容器和下部容器的横截面积之比为1：2，且下部容器的高和底面直径均为2dm那么：1当圆柱形容器盛装一定量的汽油时，上部与下部容器中汽油的深度之比为2
29、：1那么，此时电路中的电流是多少？2假设汽油价格是8 元/升，当该汽车在高速公路上匀速100Km 时，油量表的指针由满刻度指到了刻度，那么，汽车每匀速行驶1Km 所消耗的汽油费是多少元？=3|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 5 页，共 16 页文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R
30、1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4
31、S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A
32、8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C
33、3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2
34、I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT
35、9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT
36、2C3R1N7Q1 ZL5J2I4S1V2.-.word.zl参考答案与试题解析一选择题共12 小题1标有“4V 0.25A的小灯泡和“20 1A的滑动变阻器连接在如以下图的电路中电源电压为6V，电流表量程为“0 0.6A，电压表量程为“03V为确保电路平安，闭合开关时，滑动变阻器接入电路的阻值变化围应控制在A0 8B8 16C1 5 20D以上答案都不对解答：解：根据欧姆定律可得，灯泡的电阻：RL=16，灯泡的额定电流为0.25A，电流表的量程为00.6A，为确保电路平安电路中的最大电流为I=IL=0.25A，电路中的总电阻：R=24，|精.|品.|可.|编.|辑.|学.|习.|资.|料.*
37、|*|*|*|欢.|迎.|下.|载.第 6 页，共 16 页文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R
38、1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4
39、S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A
40、8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C
41、3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2
42、I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT
43、9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2.-.word.zl所以滑动变阻器接入电路的最小值为：R滑=RRL=24 16=8；当电压表的示数U滑=3V 时，滑动变阻器接入电路的电阻最大灯泡两端电压为：UL=U U滑=6V 3V=3V，此时电路中的
44、电流：I=0.1875A，滑动变阻器接入电路的最大阻值为：R滑=16；所以滑动变阻器接入电路的电阻变化围为8 16应选 B2标有“2V 0.5A字样的小灯泡和标有“20 1A 字样的滑动变阻器，连接在如以下图的电路中，其电源电压为6V，电流表的量程为“0O.6A，电压表的量程为“03V闭合开关，在不损坏用电器的前提下，移动滑动变阻器滑片，电流表、电压表示数的围是AO.25A 0.6A，1V2V B O.3A O.5A，1V1.5V C O.25A 0.5A，1.5V2V DO.25A0.5A，1V2V 解答：解：1灯泡电阻为RL=4；2由题意知，灯泡、滑动变阻器、电流表的额定电流中，灯泡的额定
45、电流最小，因此电路允许通过的最大电流是I最大=IL=0.5A，此时，电压表示数最大为U最大=UL=2V；3当滑动变阻器接入电路的阻值为最大阻值时，电路电流最小，电压表示数最小，由欧姆定律得：I最小=0.25A，电压表的最小示数U最小=I最小RL=0.25A 4=1V；所以电流表的示数围是0.25A0.5A；电压表的示数围是1V2V应选 D点评：此题考察了串联电路的特点、欧姆定律的应用，判断电表示数的围，对学生来说有一定的难度；知道什么时候电路电流最大，与最小是正确解题的关键，也是此题的难点3 2021?模拟标有“2V 1W 字样的小灯泡和标有“20 1A字样的滑动变阻器，连接在如以下图的电路中
46、，其中电源电压为6V闭合开关后，移动滑动变阻器滑片，那么电流表、电压表示数的围是|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 7 页，共 16 页文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S
47、1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8
48、H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3
49、R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I
50、4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9A8H10A7F9 HT2C3R1N7Q1 ZL5J2I4S1V2文档编码:CT9