1/5单选题
难度：
1.
有两个电阻，R1=10Ω，R2=6Ω，如果把它们串联在电路中，通过它们的电流分别为I1、I2，它们两端的电压分别为U1，U2，则I1：I2、U1：U2分别为（ ）
| A | 1：1，5：3 |
| B | 5：3，1：1 |
| C | 1：1，1：1 |
| D | 5：3，2：3 |
- 提示1：
- PHA+5Liy6IGU55S16Lev55S15rWB5aSE5aSE55u4562JLOeUteWOi+avlOetieS6jueUtemYu+avlDwvcD4=
正确答案：QQ==
PGRpdj7kuLLogZTnlLXot6/nlLXmtYHlpITlpITnm7jnrYks55S15Y6L5q+U562J5LqO55S16Zi75q+ULOWImUHmraPnoa48L2Rpdj4=
2/5单选题
难度：
2.
如图所示电源电压保持不变，R1=7Ω，R2=8Ω，S闭合，电压表的示数为4V，则电源电压为（ ）
| A | 2.5V |
| B | 7.5V |
| C | 14V |
| D | 3.5V |
- 提示1：
- PHA+5Liy6IGU55S16Lev55S15Y6L5q+U562J5LqO55S16Zi75q+UPC9wPg==
- 提示2：
- PHA+5Liy6IGU55S16Lev5oC755S15Y6L562J5LqO5ZCE55S15Y6L5LmL5ZKMPGJyPjwvcD4=
正确答案：Qg==
PGRpdj7kuLLogZTnlLXot6/nlLXljovmr5TnrYnkuo7nlLXpmLvmr5Qs5YiZUjxzdWI+MTwvc3ViPuS4pOerr+eUteWOi+S4ujMuNVbvvIzmgLvnlLXljovnrYnkuo43LjVW77yMROato+ehrjxicj48L2Rpdj4=
3/5单选题
难度：
3.
如图所示电路中，电源电压恒定不变，R1：R2=1：2，当开关S闭合时，电流表的示数为I1，把开关S断开后，电流表的示数为I2，则I1：I2为（ ）
| A | 3：1 |
| B | 1：2 |
| C | 2：1 |
| D | 1：3 |
- 提示1：
- PHA+5byA5YWz6Zet5ZCILFI8c3ViPjI8L3N1Yj7nn63ot68s5byA5YWz5pat5byALOS4pOeUtemYu+S4suiBlDxicj48L3A+
- 提示2：
- PHA+5qC55o2uST08aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvOUIvckJBQ0ZGTU1hb3FUSFQxQkFBQUJOWEVXMlVBNDExLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wMC85Qi9yQkFDRkZNTWFvcVRIVDFCQUFBQk5YRVcyVUE0MTEucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iNyI+5Y2z5Y+v5rGC5b6X55S15rWB5q+UPC9wPg==
正确答案：QQ==
PGRpdj7lvZPlvIDlhbNT6Zet5ZCI5pe277yM55S16Lev5Li6UjxzdWI+MTwvc3ViPueahOeugOWNleeUtei3r++8jOeUtea1geihqOa1i+eUtei3r+eUtea1gTwvZGl2PjxkaXY+STxzdWI+MTwvc3ViPj08aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvOUIvckJBQ0ZGTU1hb3FRenlvLUFBQUJVMnVkN0dzMzI1LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC85Qi9yQkFDRkZNTWFvcVF6eW8tQUFBQlUydWQ3R3MzMjUucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iMTIiPjwvZGl2PjxkaXY+5b2T5byA5YWzU+aWreW8gOWQju+8jOS4pOeUtemYu+S4suiBlO+8jOeUtea1geihqOWQjOagt+a1i+eUtei3r+eUtea1ge+8jOeUtea1geihqOeahOekuuaVsDxicj48L2Rpdj48ZGl2Pkk8c3ViPjI8L3N1Yj49PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzIzLzhCL3JCQUNFMU1NYW9yeGVDZ1FBQUFCaFVZYzZPNDA0My5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvOEIvckJBQ0UxTU1hb3J4ZUNnUUFBQUJoVVljNk80MDQzLnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9IjMwIj49PGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAwLzlCL3JCQUNGRk1NYW9yd0NPN1lBQUFCbUZVRXJrYzAwMC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvOUIvckJBQ0ZGTU1hb3J3Q083WUFBQUJtRlVFcmtjMDAwLnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9IjM2Ij49PGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzIzLzhCL3JCQUNFMU1NYW9yQW1nT0ZBQUFCYlRfVXF1bzg2Mi5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvOEIvckJBQ0UxTU1hb3JBbWdPRkFBQUJiVF9VcXVvODYyLnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9IjE3Ij48L2Rpdj48ZGl2PuaJgOS7pUk8c3ViPjE8L3N1Yj7vvJpJPHN1Yj4yPC9zdWI+PTxpbWcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC85Qi9yQkFDRkZNTWFvcVF6eW8tQUFBQlUydWQ3R3MzMjUucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAwLzlCL3JCQUNGRk1NYW9xUXp5by1BQUFCVTJ1ZDdHczMyNS5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSIxMiI+OjxpbWcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yMy84Qi9yQkFDRTFNTWFvdnpXYVVwQUFBQmNnV3ViLWM5NTgucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzIzLzhCL3JCQUNFMU1NYW92eldhVXBBQUFCY2dXdWItYzk1OC5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSIyMCI+PTPvvJoxPC9kaXY+
4/5单选题
难度：
4.在探究“串联电路电压规律”的实验中，小林同学连接完如图所示的电路. 当开关断开时，发现电压表示数为6V；闭合开关后，发现电压表示数变为2V. 则开关闭合后，下列说法正确的是（ ）
| A | R1两端的电压与R2两端的电压之比为3：1 |
| B | R1的电阻与R2的电阻之比为1：2 |
| C | 通过R1的电流与通过R2的电流之比为2：1 |
| D | R1消耗的功率与R2消耗的功率之比为2：1 |
- 提示1：
- IOW9k+W8gOWFs+aWreW8gOaXtiznlLXljovooajmtYvnlLXmupDnlLXljos=
- 提示2：
- IOS4suiBlOeUtei3r+S4pOerr+eahOaAu+eUteWOi+etieS6juWQhOmDqOWIhueUtei3r+S4pOerr+eahOeUteWOi+S5i+WSjC4g5Liy6IGU55S16Lev5pyJ5YiG5Y6L5L2c55So77yM55S15Y6L5LmL5q+U562J5LqO55S16Zi75LmL5q+U
正确答案：Qg==
PGRpdj7lvZPlvIDlhbPmlq3lvIDml7Ys55S15Y6L6KGo5rWL55S15rqQ55S15Y6LO+S4suiBlOeUtei3r+S4pOerr+eahOaAu+eUteWOi+etieS6juWQhOmDqOWIhueUtei3r+S4pOerr+eahOeUteWOi+S5i+WSjC4g5Liy6IGU55S16Lev5pyJ5YiG5Y6L5L2c55So77yM55S15Y6L5LmL5q+U562J5LqO55S16Zi75LmL5q+ULOWImULmraPnoa48L2Rpdj4=
5/5单选题
难度：
5.
如图所示，当开关S闭合，甲、乙两表为电压表时，两表读数之比U甲：U乙为4：1；当开关S断开，甲、乙两表为电流表时，两表的读数之比I甲：I乙为（ ）
| A | 4：3 |
| B | 3：2 |
| C | 3：4 |
| D | 3：1 |
- 提示1：
- PHA+56Gu5a6a5byA5YWz5pat5byA5oiW6Zet5ZCI5a+555S16Lev55qE5b2x5ZONPC9wPg==
- 提示2：
- PHA+5Liy6IGU55S16Lev55S15Y6L5q+U562J5LqO55S16Zi75q+UPC9wPg==
- 提示3：
- PHA+5bm26IGU55S16Lev55S15rWB5q+U562J5LqO55S16Zi755qE5Y+N5q+UPC9wPg==
正确答案：Qw==
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