本课配套习题挑战模式1/5
如图所示的电路中,电源电压保持不变,R为定值电阻,当开关闭合时,标有“8V 8W”的小灯泡L恰好正常发光;若保持定值电阻R不变,将L换成另一只标有“8V 4W”的小灯泡,闭合开关后,小灯泡工作时消耗的实际功率
( )
A: 大于4W |
B: 等于4W |
C: 小于4W |
D: 无法确定 |
- 提示1:PHA+6K6h566X5Lik54Gv55qE55S16Zi7PC9wPg==
- 提示2:PHA+55S16Zi75Y+Y5aSn77yM5a6D5Lik56uv55qE55S15Y6L5Y+Y5aSnPC9wPg==
- 答案:QQ==
PGRpdj7orqHnrpfkuKTnga/nmoTnlLXpmLss5LiA5byA5aeL5Li6OM6pLOWQjuadpeWPmOS4ujE2zqnjgIIg55S16Zi75Y+Y5aSn77yM5a6D5Lik56uv55qE55S15Y6L5Y+Y5aSn77yM5omA5Lul55S15Y6L5aSn5LqOOFbvvIzlip/njoflsLHlpKfkuo40Vy48L2Rpdj4=
本课配套习题挑战模式2/5
A: 12W |
B: 6W |
C: 3W |
D: 2W |
- 提示1:IDxhIG5hbWU9Ik9MRV9MSU5LMiI+PC9hPjxhDQpuYW1lPSJPTEVfTElOSzEiPuiuoeeul+eBr+eahOeUtemYuzwvYT4=
- 提示2:IOS4gOW8gOWni+ato+W4uOWPkeWFie+8jOivtOaYjueUtea6kOeUteWOi+S4ujZW77yMUzxzdWI+Mjwvc3ViPuaWreW8gOWQju+8jOS4pOeBr+S4suiBlA==
- 提示3:IOaAu+eUtemYu+WPmOS4uuWOn+adpeeahOS4pOWAje+8jOWKn+eOh+WwseWPmOS4uuWOn+adpeeahOS6jOWIhuS5i+S4gOOAgg==
- 答案:Qw==
PGRpdj7orqHnrpfnga/nmoTnlLXpmLss5LiA5byA5aeL5q2j5bi45Y+R5YWJ77yM6K+05piO55S15rqQ55S15Y6L5Li6NlbvvIxTPHN1Yj4yPC9zdWI+5pat5byA5ZCO77yM5Lik54Gv5Liy6IGULOaAu+eUtemYu+WPmOS4uuWOn+adpeeahOS4pOWAje+8jOWKn+eOh+WwseWPmOS4uuWOn+adpeeahOS6jOWIhuS5i+S4gOOAguaJgOS7peS4ujNXLjwvZGl2Pg==
本课配套习题挑战模式3/5
标有“2400Ω,40W”和“2400Ω,20W”的两个定值电阻,串联起来接在220V的电路上,则它们在相同的时间内产生的热量之比为()
A: 1:2 |
B: 2:1 |
C: 1:1 |
D: 1:4 |
- 提示1:PHA+55yL55S16Zi7PC9wPg==
- 提示2:PHA+5Liy6IGU55S16Lev77yM5Yqf546H5q+U562J5LqO55S16Zi75q+U44CCPC9wPg==
- 答案:Qw==
PGRpdj7kuLLogZTnlLXot6/vvIzlip/njofmr5TnrYnkuo7nlLXpmLvmr5Qs5Zug5Li655S16Zi755u4562J77yM5omA5Lul5Yqf546H55u4562J77yM5omA5Lul55u45ZCM5pe26Ze05YaF77yM5Lqn55Sf55qE54Ot6YeP55u45ZCM44CCPC9kaXY+
本课配套习题挑战模式4/5
A: “220V,40W ”的灯较亮 |
B: “36V,40W”的灯较亮 |
C: 两只电灯一样亮 |
D: 无法判断哪只电灯较亮 |
- 提示1:IOS4suiBlOeUtei3r+S4re+8jOWKn+eOh+avlOetieS6jueUtemYu+avlOOAgg==
- 提示2:IOeBr+eahOS6ruW6puWGs+WumuS6jueBr+eahOWunumZheWKn+eOhw==
- 答案:QQ==
PGRpdj7kuLLogZTnlLXot6/kuK3vvIzlip/njofmr5TnrYnkuo7nlLXpmLvmr5TjgILmsYLlh7rkuKTnga/nmoTnlLXpmLvvvIwyMjBW77yMNDBX54Gv55qE55S16Zi75aSn77yM54Gv55qE5Lqu5bqm5Yaz5a6a5LqO54Gv55qE5a6e6ZmF5Yqf546H77yM5omA5Lul5a6D5q+U6L6D5Lqu44CCPC9kaXY+
本课配套习题挑战模式5/5
A: 灯泡与电阻消耗的总功率为7W |
B: 灯泡与电阻消耗的总功率为6W |
C: 灯泡与电阻消耗的总功率大于6W |
D: 灯泡与电阻消耗的总功率小于6w |
- 提示1:IOS4suiBlOWQjueUtei3r+aAu+eUtemYu+WPmOWkpw==
- 提示2:IOaJgOS7peaAu+WKn+eOh+Wwj+S6jueBr+eahOmineWumuWKn+eOhw==
- 答案:RA==
PGRpdj7kuLLogZTlkI7nlLXot6/mgLvnlLXpmLvlj5jlpKcs5omA5Lul5oC75Yqf546H5bCP5LqO54Gv55qE6aKd5a6a5Yqf546HLOaJgOS7peeBr+azoeS4jueUtemYu+a2iOiAl+eahOaAu+WKn+eOh+Wwj+S6jjZ3PC9kaXY+