本课配套习题挑战模式1/5
如图所示的电路,电阻R1的阻值是4 Ω ,电压表V1与V2的示数相等,R2与R3的功率之和是R1消耗功率的5倍,则电阻R3的阻值是( )
A: 12 Ω |
B: 8 Ω |
C: 4 Ω |
D: 1 Ω |
- 提示1:PHA+55S15Y6L6KGoVjxzdWI+MTwvc3ViPuS4jlY8c3ViPjI8L3N1Yj7nmoTnpLrmlbDnm7jnrYks5YiZ5pyJUjxzdWI+MTwvc3ViPitSPHN1Yj4yPC9zdWI+PVI8c3ViPjM8L3N1Yj7vvIw8L3A+
- 提示2:PHA+5Liy6IGU55S16Lev55S15rWB5aSE5aSE55u4562JPC9wPg==
- 提示3:PHA+5Liy6IGU55S16Lev5Yqf546H5LiO55S16Zi75oiQ5q2j5q+UPC9wPg==
- 答案:QQ==
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
本课配套习题挑战模式2/5
A: I1:I2=3:2 |
B: U1:U2=1:1 |
C: P:P’ =2:9 |
D: P1: P1´=3:2 |
- 提示1:IOmmluWFiOagueaNruW8gOWFs+eahOmXreWQiOS4juaWreW8gOaKiueUtei3r+eugOWMlg==
- 提示2:IOaWreW8gFM8c3ViPjE8L3N1Yj7jgIFTPHN1Yj4zPC9zdWI+77yM6Zet5ZCIUzxzdWI+Mjwvc3ViPu+8jFI8c3ViPjE8L3N1Yj7kuI5SPHN1Yj4yPC9zdWI+5Liy6IGU77yM55S15Y6L6KGo5rWL6YePUjxzdWI+MTwvc3ViPuS4pOerr+eUteWOi++8jOeUtea1geihqOa1i+mHj+S4suiBlOeUtei3r+eUtea1ge+8jOWmguWbvueUsu+8jOW5tuWcqOWbvuS4iuagh+WHuuebuOW6lOeahOeJqeeQhumHjy4gPGltZyB3aWR0aD0yMTAgaGVpZ2h0PTE1MSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzIzLzk3L3JCQUNFMU1NYnVqU1dfT0pBQUFqREhSSTRMMDQ3MS5wbmciPg==
- 提示3:IOaWreW8gFM8c3ViPjI8L3N1Yj7vvIzpl63lkIhTPHN1Yj4xPC9zdWI+44CBUzxzdWI+Mzwvc3ViPu+8jFI8c3ViPjE8L3N1Yj7kuI5SPHN1Yj4yPC9zdWI+5bm26IGU77yM55S15Y6L6KGo5rWL5ZCE5pSv6Lev5Lik56uv55S15Y6L77yM55S15rWB6KGo5rWLUjxzdWI+MTwvc3ViPuS4reeahOeUtea1ge+8jOWmguWbvuS5me+8jOW5tuWcqOWbvuS4iuagh+WHuuebuOW6lOeahOeJqeeQhumHjy4gPGltZyB3aWR0aD0yMjIgaGVpZ2h0PTE1MSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzAwL0E4L3JCQUNGRk1NYnVpakRWTzRBQUFsZHh4TjVZRTA5Ny5wbmciPg==
- 答案:Qw==
PGRpdj48aW1nIHdpZHRoPTM2NSBoZWlnaHQ9MzA5IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvOTcvckJBQ0UxTU1idWpBa0o2TUFBQXR3UzBGaktFMzE5LnBuZyI+PC9kaXY+
本课配套习题挑战模式3/5
如图所示电路,电源两端电压保持不变,灯L1和L2的电阻之比是3∶5(设灯丝电阻不变),下列判断正确的是( )
A: 开关S1闭合、S2由闭合到断开,两次电流表示数比为5∶3 |
B: 开关S1闭合、S2由闭合到断开,两次电流表示数比为8∶5 |
C: 当开关S1、S2都闭合,灯L1、L2的实际功率比为5∶3 |
D: 电路工作时,消耗的最大功率与最小功率比为8∶3 |
- 提示1:PHA+5pys6aKY55uu5qC55o2u55S16Lev5Zu+77yM5Yip55So5qyn5aeG5a6a5b6L44CB55S15Yqf546H5YWs5byP5p2l6K6h566X5Ye65Yik5pat5Ye655S15rWB44CB55S15Yqf546H55qE5aSn5bCP5q+U5L6L5YWz57O7LiDkvYbmmK/pppblhYjlvpfnnIvmh4LnlLXot6/lm77vvIzkuZ/lsLHmmK/nroDljJbnlLXot6/lm77vvIznn6XpgZPnlLXmtYHooajnlLXljovooajmtYvlvpfmmK/osIHnmoTnpLrmlbA8L3A+
- 答案:QixDLEQ=
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
本课配套习题挑战模式4/5
图是一台饮水机的加热水槽部分工作原理电路图。S是一个温控开关,R1为电加热管,当饮水机处于加热状态时,水被迅速加热,达到预定温度时,S自动切换到另一保温状态。已知饮水机加热时加热管的功率为550 W,而保温时加热管的功率为88 W(不考虑温度对电阻的影响,且不计指示灯的阻值),A、B是两种不同颜色的指示灯。下列说法中,正确的是( )
A: 当B灯亮时,表示正在对水加热 |
B: 加热状态时的总电阻为88Ω |
C: 保温状态时的总电阻为132Ω |
D: 加热状态电路中的电流是保温状态电路中电流的2.5倍 |
- 提示1:PHA+6aWu5rC05py655qE5Yqg54Ot5ZKM5L+d5rip5piv55Sx55S154Ot566h55qE5Yqf546H5Yaz5a6a55qE77yM55S154Ot566h5Yqf546H5aSn5bCx5piv5Yqg54Ot77yM55S154Ot566h5Yqf546H5bCP5bCx5piv5L+d5rip77ybPC9wPg==
- 提示2:PHA+5bey55+l5Yqg54Ot5pe25Yqg54Ot566h55qE5Yqf546H77yM5qC55o2u5YWs5byP5Y+v5rGCUjxzdWI+MTwvc3ViPueahOWkp+Wwj++8m+agueaNruWFrOW8j1A9STxzdXA+Mjwvc3VwPlLlj6/msYLkv53muKnml7bnmoTnlLXmtYHvvIzmoLnmja7mgLvnlLXljovlkoznlLXmtYHmsYLlh7rnlLXot6/nmoTmgLvnlLXpmLs8L3A+
- 答案:QixE
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
本课配套习题挑战模式5/5
将定值电阻R1单独接在电压为U且不变的电源两端,R1消耗的电功率是20W,将定值电阻R2单独接在这个电源两端,R2消耗的电功率是30W。若将R1和R2串联后接在另一个电压为1.5U的电源两端,则这两个电阻消耗的总电功率是()
A: 27W |
B: 25W |
C: 12W |
D: 10W |
- 提示1: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
- 答案:QQ==
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