配套习题- 巧求滑动变阻器最大功率 -【青果学院】

挑战习题

1/5单选题

难度：

如图所示电路，电路两端电压为12V，保持不变。R₁< R₂,R₂最大阻值为50Ω，已知：滑动变阻器消耗的最大功率为3W，则定值电阻R₁的阻值为 ( )

A	6Ω
B	12Ω
C	15Ω
D	50Ω

提示1：: PHA+5b2TUjxzdWI+MTwvc3ViPj0gUjxzdWI+Mjwvc3ViPu+8jFI8c3ViPjI8L3N1Yj7nmoTlip/njofmnIDlpKfjgII8L3A+

正确答案：Qg==

PGRpdj7lvZNSPHN1Yj4xPC9zdWI+PVI8c3ViPjI8L3N1Yj7vvIxSPHN1Yj4yPC9zdWI+55qE5Yqf546H5pyA5aSn77yM5omA5LulUjxzdWI+MTwvc3ViPueahOWKn+eOh+S5n+aYrzNX77yM55Sx5oC755S15Y6L5ZKM5oC75Yqf546H5Y+v5b6X5oC755S16Zi7UjxzdWI+5oC7PC9zdWI+Pe+8iDEyVu+8iTxzdXA+Mjwvc3VwPi82Vz0yNM6p77yM5omA5LulUjxzdWI+MTwvc3ViPuS4ujEyzqk8YnI+PC9kaXY+PGRpdj7mlYXpgIlCPGJyPjwvZGl2Pg==

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2/5单选题

难度：

如图所示电路，电路两端电压为12V，保持不变。灯L标有“6V,3W”字样，小灯泡电阻不随温度变化。R₁的阻值为10Ω，滑动变阻器的最大阻值为50Ω，滑动变阻器的阻值为多少才能使它在该电路下发挥最大功率( )

A	12Ω
B	10Ω
C	22Ω
D	50Ω

提示1：: PHA+5b2TUjxzdWI+Mjwvc3ViPj0gUjxzdWI+MTwvc3ViPisgUjxzdWI+TDwvc3ViPu+8jFI8c3ViPjI8L3N1Yj7nmoTlip/njofmnIDlpKfjgII8L3A+

正确答案：Qw==

PGRpdj7lvZNSPHN1Yj4yPC9zdWI+PVI8c3ViPjE8L3N1Yj4rIFI8c3ViPkw8L3N1Yj7vvIxSPHN1Yj4yPC9zdWI+55qE5Yqf546H5pyA5aSnLOaJgOS7pVI8c3ViPjI8L3N1Yj49MjLOqeOAgjwvZGl2Pg==

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3/5单选题

难度：

如图所示电路，电路两端电压为12V，保持不变。灯L标有“6V,2W”字样，小灯泡电阻不随温度变化。R₁的阻值为12Ω，R₂最大阻值为50Ω，则滑动变阻器消耗的最大功率为（）

A	1.8
B	2.5
C	0.75W
D	1.2 W

提示1：: PHA+5b2TUjxzdWI+Mjwvc3ViPj0gUjxzdWI+MTwvc3ViPisgUjxzdWI+TDwvc3ViPu+8jFI8c3ViPjI8L3N1Yj7nmoTlip/njofmnIDlpKfjgII8L3A+

正确答案：RA==

PGRpdj7lvZNSPHN1Yj4yPC9zdWI+PVI8c3ViPjE8L3N1Yj4rIFI8c3ViPkw8L3N1Yj7vvIxSPHN1Yj4yPC9zdWI+55qE5Yqf546H5pyA5aSnLOeUseW3suefpeWPr+efpe+8mlI8c3ViPkw8L3N1Yj49MTjOqe+8jOaJgOS7peW9k1I8c3ViPjI8L3N1Yj49MzDOqeaXtuWKn+eOh+acgOWkp++8jOS4lOWug+atpOaXtuS4pOerr+eUteWOi+S4uueUtea6kOeUteWOi+eahOS4gOWNiu+8jOiuoeeul+W+l+WKn+eOh+S4ujEuMiBX44CCPC9kaXY+

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4/5单选题

难度：

如图所示电路中，灯L标有“6V,3W”字样. 小灯泡电阻不随温度变化。当开关S₁闭合，滑动变阻器滑片在左端时，灯正常发光；当滑动变阻器滑片滑到右端时，L的功率为额定功率的1/4，则滑动变阻器能达到的最大功率为（）

A	1.5W
B	3W
C	0.75W
D	0.5W

提示1：: PHA+5YiG5p6Q5Lik5qyh55qE55S16Lev54q25oCB77yM5b6X55S15rqQ55S15Y6L5Li6NlbjgII8YnI+PC9wPg==

提示2：: PHA+5ruR54mH5Zyo5Y+z56uv5pe277yMIOWwj+eBr+azoeS4pOerr+eUteWOi+S4uuWOn+adpeeahOS4gOWNijxicj48L3A+

提示3：: PHA+5ruR5Yqo5Y+Y6Zi75Zmo55S16Zi75ZKM5bCP54Gv5rOh55S16Zi755u45ZCM5pe277yM5Yqf546H5pyA5aSnPGJyPjwvcD4=

正确答案：Qw==

PGRpdj7liIbmnpDkuKTmrKHnmoTnlLXot6/nirbmgIEs5ruR54mH5Zyo5Y+z56uv5pe277yM55Sx5Yqf546H5Y+Y5Li65Y6f5p2l55qE5Zub5YiG5LmL5LiA5Y+v55+l77yM55S16Lev55S15rWB5Li65Y6f5p2l55qE5LiA5Y2K5Liq77yM5omA5Lul55S16Zi75Li65Y6f5p2l55qE5Lik5YCN77yM5Y2z5a6D5Lus55qE55S16Zi755u4562J77yM5Yqf546H5Lmf55u4562J5Zyw77yM5ruR54mH5Zyo5pyA5Y+z56uv5pe277yM5a6D55qE5Yqf546H5pyA5aSn56Gu77yM5Li654Gv6aKd5a6a5Yqf546H55qE5Zub5YiG5LmL5LiA77yM5omA5Lul5Li6MC43NVfjgII8YnI+PC9kaXY+

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5/5单选题

难度：

5.如图所示电路，R₁、R₂为定值电阻，R₂=4Ω ，R₁=2R₂滑动变阻器最大阻值为50Ω，闭合开关，调节滑片位置，滑动变阻器消耗的最大功率为3W，则电源电压为 ( )

A	15V
B	6V
C	12V
D	24V

提示1：: IOW9k1I8c3ViPjM8L3N1Yj49IFI8c3ViPjE8L3N1Yj4rIFI8c3ViPjI8L3N1Yj7vvIxSPHN1Yj4zPC9zdWI+55qE5Yqf546H5pyA5aSn

正确答案：Qw==

PGRpdj7lvZNSPHN1Yj4zPC9zdWI+PVI8c3ViPjE8L3N1Yj4rIFI8c3ViPjI8L3N1Yj7vvIxSPHN1Yj4yPC9zdWI+55qE5Yqf546H5pyA5aSnLOaJgOS7peagueaNruS4suiBlOeUtei3r+eJueeCue+8jFI8c3ViPjE8L3N1Yj7jgIFSPHN1Yj4yPC9zdWI+55qE5oC75Yqf546H5Lmf5Li6M1fvvIznlLXot6/nmoTmgLvlip/njofkuLo2VyzmgLvnlLXpmLvkuLoyNM6p44CC5qC55o2uUD1VL1Llj6/orqHnrpflh7rnlLXmupDnlLXljovkuLoxMlYuPC9kaXY+

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