本课配套习题挑战模式2/5
有两个电阻,R1=4Ω,R2=6Ω,如果把它们并联在电路中,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U1:U2应该等于( )
A: 1:1 |
B: 2:3 |
C: 3:2 |
D: 无法确定 |
- 提示1:PHA+5bm26IGU55S16Lev5ZCE5pSv6Lev55S15Y6L562J5LqO55S15rqQ55S15Y6LPC9wPg==
- 答案:QQ==
PGRpdj7lubbogZTnlLXot6/vvIzlkITmlK/ot6/nlLXljovnrYnkuo7nlLXmupDnlLXljovvvIzliJnkuKTnlLXljovnm7jnrYnvvIzmr5TlgLzkuLoxOjE8L2Rpdj4=
本课配套习题挑战模式3/5
A: 1:1 |
B: 1:2 |
C: 2:1 |
D: 无法判断 |
- 提示1:IOW5tuiBlOeUtei3r+S4pOerr+eUteWOi+ebuOetie+8jOeUtea1geS4jeebuOetie+8jOaYr+eUseS6jueUtemYu+S4jeWQjA==
- 答案:QQ==
PGRpdj7nlKjnlLXlmajlubbogZTvvIznlLXljovmr5TnrYnkuo4xOjHvvIzliJnpgInmi6lB6YCJ6aG5PC9kaXY+
本课配套习题挑战模式4/5
如图所示电路中,电压表V1、V2、V3的示数分别为U1、U2、U3,电流表A1、A2的示数分别为Il、I2,那么下列关系式正确的是( )
A: U2=Ul+U3 |
B: U2=U1=U3 |
C: Ul+U2=U3 |
D: 无法确定 |
- 提示1:PHA+55S16Lev5Li65Liy6IGU55S16Lev77yMVTxzdWI+Mjwvc3ViPuaJgOa1i+eUteWOi+S4uuS4pOeUtemYu+eUteWOi++8jFU8c3ViPjM8L3N1Yj7mtYvkuIrpnaLnlLXpmLvnmoTnlLXljovvvIxVPHN1Yj4xPC9zdWI+5rWL5LiL6Z2i55S16Zi755qE55S15Y6L77yM5YiZVTxzdWI+Mjwvc3ViPj1VPHN1Yj5sPC9zdWI+K1U8c3ViPjM8L3N1Yj48YnI+PC9wPg==
- 答案:QQ==
PGRpdj7nlLXot6/kuLrkuLLogZTnlLXot6/vvIxVPHN1Yj4yPC9zdWI+5omA5rWL55S15Y6L5Li65Lik55S16Zi755S15Y6L77yMVTxzdWI+Mzwvc3ViPua1i+S4iumdoueUtemYu+eahOeUteWOi++8jFU8c3ViPjE8L3N1Yj7mtYvkuIvpnaLnlLXpmLvnmoTnlLXljovvvIzliJlVPHN1Yj4yPC9zdWI+PVU8c3ViPmw8L3N1Yj4rVTxzdWI+Mzwvc3ViPu+8jOWImemAieaLqemAiemhuUE8YnI+PC9kaXY+
本课配套习题挑战模式5/5
如图所示,设电源电压保持不变,S1断开S2闭合时,电压表读数为4.5V,S1闭合S2断开时,电压表读数变为3V,灯泡Ll和L2两端电压分别是( )
A: 3V和4.5V |
B: 3V和1.5V |
C: 3V和3V |
D: 1.5V和4.5V |
- 提示1:PHA+UzxzdWI+MTwvc3ViPuaWreW8gFM8c3ViPjI8L3N1Yj7pl63lkIjml7bvvIznlLXot6/kuLLogZTvvIznlLXljovooajmiYDmtYvnlLXljovkuLpMPHN1Yj4xPC9zdWI+5ZKMTDxzdWI+Mjwvc3ViPueahOeUteWOi+WSjO+8jOivu+aVsOS4ujQuNVbvvJtTPHN1Yj4xPC9zdWI+6Zet5ZCIUzxzdWI+Mjwvc3ViPuaWreW8gOaXtu+8jOeUteWOi+ihqOa1i0w8c3ViPjE8L3N1Yj7nmoTnlLXljovvvIzor7vmlbDlj5jkuLozVu+8jOWImUw8c3ViPjI8L3N1Yj7nlLXljovkuLoxLjVWPGJyPjwvcD4=
- 答案:Qg==
PGRpdj5TPHN1Yj4xPC9zdWI+5pat5byAUzxzdWI+Mjwvc3ViPumXreWQiOaXtu+8jOeUteWOi+ihqOaJgOa1i+eUteWOi+S4uueUtea6kOeUteWOi++8jOWNs0w8c3ViPjE8L3N1Yj7lkoxMPHN1Yj4yPC9zdWI+55qE55S15Y6L5ZKM77yM6K+75pWw5Li6NC41Vu+8m1M8c3ViPjE8L3N1Yj7pl63lkIhTPHN1Yj4yPC9zdWI+5pat5byA5pe277yM55S15Y6L6KGo5rWLTDxzdWI+MTwvc3ViPueahOeUteWOi++8jOivu+aVsOWPmOS4ujNW77yM5YiZTDxzdWI+Mjwvc3ViPueUteWOi+S4ujEuNVbvvIzliJnpgInpoblC5q2j56GuPGJyPjwvZGl2Pg==