中学生网络课堂本课配套习题挑战模式1/5
如图所示的电路中，A1和A2是两个完全相同的电流表，均有“0－0.6A”、“0－3A”两个量程，当开关S闭合时，两表均有正常的示数，且指针偏转的角度相同，则R1：R2为（）
| A: 1：4 |
| B: 4：1 |
| C: 1：5 |
| D: 5：1 |
- 提示1：PHA+QTxzdWI+MTwvc3ViPua1i+aUr+i3r+eUtea1ge+8jEE8c3ViPjI8L3N1Yj7mtYvlubLot6/nlLXmtYHvvIzliJnkuIDlrprmmK/lubLot6/nlLXmtYHooajph4/nqIvlpKfvvIzmlK/ot6/nlLXmtYHooajph4/nqIvlsI88YnI+PC9wPg==
- 提示2：PHA+5YGP6L2s6KeS5bqm55u45ZCM77yM55Sx6YeP56iL5YWz57O75b6X5bmy6Lev55S15rWB5piv5pSv6Lev55S15rWB55qENeWAjTwvcD4=
- 答案：Qg==
PGRpdj5BPHN1Yj4xPC9zdWI+5rWL5pSv6Lev55S15rWB77yMQTxzdWI+Mjwvc3ViPua1i+W5sui3r+eUtea1ge+8jOWImeS4gOWumuaYr+W5sui3r+eUtea1geihqOmHj+eoi+Wkp++8jOaUr+i3r+eUtea1geihqOmHj+eoi+Wwj++8m+WBj+i9rOinkuW6puebuOWQjO+8jOeUsemHj+eoi+WFs+ezu+W+l+W5sui3r+eUtea1geaYr+aUr+i3r+eUtea1geeahDXlgI3vvIzliJlSPHN1Yj4yPC9zdWI+5pSv6Lev55qE55S15rWB5pivUjxzdWI+MTwvc3ViPuaUr+i3r+eUtea1geeahDTlgI3vvIznlLXmtYHmr5TnrYnkuo7nlLXpmLvnmoTlj43mr5TvvIzliJlC5q2j56GuPGJyPjwvZGl2Pg==
本课配套习题挑战模式2/5
图示电路中，当开关S闭合，甲、乙两表是电压表时，示数之比U甲：U乙=3：2，当开关S断开，甲、乙两表都是电流表时，则两表的示数之比I甲：I乙为 （）
| A: 2：1 |
| B: 1：3 |
| C: 2：3 |
| D: 3：1 |
- 提示1：PHA+55S15Y6L6KGo55Sy5rWL5Lik55S15Y6L5LmL5ZKM77yM5LmZ55S15Y6L6KGo5rWLUjxzdWI+Mjwvc3ViPuS4pOerr+eUteWOizwvcD4=
- 提示2：PHA+5pyJ55S15Y6L6KGo55qE56S65pWw5q+U5Y+v55+l5Lik55S16Zi7UjxzdWI+MTwvc3ViPuS4jlI8c3ViPjI8L3N1Yj7kuKTnq6/nmoTnlLXljovmr5TkuLoxOjI8L3A+
- 提示3：PHA+5Liy6IGU55S16Lev77yM55S15Y6L5q+U562J5LqO55S16Zi75q+UPC9wPg==
- 答案：Qg==
PGRpdj7nlLXljovooajnlLLmtYvkuKTnlLXljovkuYvlkozvvIzkuZnnlLXljovooajmtYtSPHN1Yj4yPC9zdWI+5Lik56uv55S15Y6L77yb5pyJ55S15Y6L6KGo55qE56S65pWw5q+U5Y+v55+l5Lik55S16Zi7UjxzdWI+MTwvc3ViPuS4jlI8c3ViPjI8L3N1Yj7kuKTnq6/nmoTnlLXljovmr5TkuLoxOjLvvJvkuLLogZTnlLXot6/vvIznlLXljovmr5TnrYnkuo7nlLXpmLvmr5TvvIzliJnlj6/nn6XkuKTnlLXpmLvkuYvmr5TnrYnkuo4xOjLvvIznlLLnlLXmtYHooajmtYtSPHN1Yj4yPC9zdWI+5pSv6Lev55S15rWB77yM5LmZ55S15rWB6KGo5bmy6Lev55S15rWB77yM55S15rWB5q+U562J5LqOMToz77yM5YiZQuato+ehruOAgjxicj48L2Rpdj4=
本课配套习题挑战模式3/5
如图所示，电源电压恒定，当开关S断开时，电流表A1与电流表A2的示数之比为4:1；当开关S闭合时，电流表A1、A2的示数之比为2：1。则下列说法正确的是（ ）
| A: R1：R2=4:3 |
| B: R1：R2=3:4 |
| C: R2：R3=1:3 |
| D: R1：R3=3:1 |
- 提示1：PHA+5b2T5byA5YWzU+aWreW8gOaXtu+8jOeUtea1geihqEE8c3ViPjE8L3N1Yj7mtYvlubLot6/nlLXmtYHvvIznlLXmtYHooahBPHN1Yj4yPC9zdWI+5rWLUjxzdWI+Mjwvc3ViPuaUr+i3r+eUtea1gTwvcD4=
- 提示2：PHA+5byA5YWzU+mXreWQiOaXtu+8jOeUtea1geihqEE8c3ViPjE8L3N1Yj7mtYtSPHN1Yj4yPC9zdWI+5ZKMUjxzdWI+Mzwvc3ViPueahOeUtea1geS5i+WSjO+8jOeUtea1geihqEE8c3ViPjI8L3N1Yj7mtYtSPHN1Yj4xPC9zdWI+5ZKMUjxzdWI+Mjwvc3ViPueahOeUtea1geS5i+WSjDwvcD4=
- 答案：RA==
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
本课配套习题挑战模式4/5
如图所示，电源电压保持不变，S闭合后，S1断开时，V1、V2示数比为5：6；S1闭合时，V1、V2示数比值为10：9；求：R1与R3的比值（ ）
| A: 10:9 |
| B: 3:1 |
| C: 4:3 |
| D: 10:3 |
- 提示1：PHA+U+mXreWQiOWQju+8jFM8c3ViPjE8L3N1Yj7mlq3lvIDvvIznga/ms6HkuI7kuKTnlLXpmLvkuLLogZTvvIznlLXljovooahWPHN1Yj4xPC9zdWI+5rWL54Gv5rOh5Lik56uv55S15Y6LPC9wPg==
- 提示2：PHA+U+mXreWQiOWQju+8jFM8c3ViPjE8L3N1Yj7pl63lkIjvvIznga/ms6HkuI5SPHN1Yj4yPC9zdWI+5Liy6IGU77yMUjxzdWI+Mzwvc3ViPuiiq+efrei3r++8jOeUteWOi+ihqFY8c3ViPjE8L3N1Yj7mtYvnga/ms6HnlLXljovvvIxWPHN1Yj4yPC9zdWI+5rWL55S16Zi7UjxzdWI+Mjwvc3ViPuS4pOerr+eUteWOizwvcD4=
- 提示3：PHA+5Liy6IGU55S16Lev55S15Y6L5q+U562J5LqO55S16Zi755qE5q+UPGJyPjwvcD4=
- 答案：RA==
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
本课配套习题挑战模式5/5
R1和R2两只电阻并联在电路中，通过R1的电流和通过R2的电流比为2：3，若再把它们串联在相同电路中，前后两次通过R1的电流比为（ ）
| A: 2：1 |
| B: 1：2 |
| C: 3：5 |
| D: 5：3 |
- 提示1：PHA+5bm26IGU55S16Lev5Lit77yM5ZCE5pSv6Lev55S15rWB5q+U562J5LqO55S16Zi755qE5Y+N5q+U44CC5omA5LulUjxzdWI+MTwvc3ViPuWSjOWSjFI8c3ViPjI8L3N1Yj7nmoTmr5TkuLoz77yaMjwvcD4=
- 提示2：PHA+5Yip55So55So5qyn5aeG5a6a5b6L6K6h566X5Lik5qyh55S15rWB5Y2z5Y+v5b6X44CCPC9wPg==
- 答案：RA==
PGRpdj7lubbogZTnlLXot6/kuK3vvIzlkITmlK/ot6/nlLXmtYHmr5TnrYnkuo7nlLXpmLvnmoTlj43mr5TjgILmiYDku6VSPHN1Yj4xPC9zdWI+5ZKM5ZKMUjxzdWI+Mjwvc3ViPueahOavlOS4ujPvvJoyPGJyPueUtea6kOeUteWOi+S/neaMgeS4jeWPmO+8jOWIqeeUqOeUqOasp+WnhuWumuW+i+iuoeeul+S4pOasoeeUtea1geWNs+WPr+W+l+eUtea1geavlOS4ujXvvJoz44CCPGJyPuS5n+WPr+S7peWIqeeUqOeUteWOi+S4jeWPmOaXtu+8jOeUtea1geavlOetieS6jueUtemYu+eahOWPjeavlOW+l+WHuuOAgjwvZGl2Pg==
