配套习题- 电功率（中） -【青果学院】

挑战习题

1/5单选题

难度：

1.家用白炽灯上标有“220V 40W”字样。当该灯正常工作时，它的功率（）

A	大于40W
B	小于40W
C	等于40W
D	等于220W

提示1：: MjIwVuaYr+ivpeeZveeCveeBr+eahOmineWumueUteWOi++8jDQwV+aYr+Wug+eahOmineWumueUteWKn+eOhw==

正确答案：Qw==

5a6255So55m954K954Gv5LiK5qCH5pyJ4oCcMjIwViA0MFfigJ3lrZfmoLfooajnpLrmraTnga/lnKgyMjBW55qE55S15Y6L5LiL5q2j5bi45bel5L2c77yM5q2j5bi45bel5L2c5pe255qE55S15Yqf546H5Li6NDBX44CC5pWF6YCJQy4=

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2/5单选题

难度：

2.三盏灯“220V100W”、“220V60W”、“220V 40W”都正常工作，则三灯中最亮的是()

A	“220V 100W”
B	“220V 60W”
C	“220V 40W”
D	一样亮

提示1：: 54Gv5rOh55qE5Lqu5bqm5piv55Sx54Gv5rOh5bel5L2c5pe255qE5a6e6ZmF55S15Yqf546H5Yaz5a6a55qE77yM5a6e6ZmF55S15Yqf546H6LaK5aSn77yM54Gv5rOh6LaK5Lqu

正确答案：QQ==

5LiJ55uP54Gv4oCcMjIwVjEwMFfigJ3jgIHigJwyMjBWNjBX4oCd44CB4oCcMjIwViA0MFfigJ3pg73mraPluLjlt6XkvZzvvIzov5nlh6DkuKrnga/nmoTlrp7pmYXlip/njofpg73nrYnkuo7ku5bku6znmoTpop3lrprlip/njofvvIzmiYDku6XigJwyMjBWMTAwV+KAneeahOeBr+acgOS6ruOAguaVhemAiUEu

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3/5单选题

难度：

3.晚间，家里的电灯突然变暗，这是因为（）

A	电灯的实际电压变大
B	电灯的额定电压变小
C	电灯的实际功率变小
D	电灯的额定功率变小

提示1：: 54Gv5rOh55qE5Lqu5bqm5piv55Sx54Gv5rOh5bel5L2c5pe25YCZ55qE5a6e6ZmF55S15Yqf546H5Yaz5a6a55qE

正确答案：Qw==

54Gv5rOh55qE5Lqu5bqm5piv55Sx54Gv5rOh5bel5L2c5pe25YCZ55qE5a6e6ZmF55S15Yqf546H5Yaz5a6a55qE77yb5a626YeM55qE55S154Gv56qB54S25Y+Y5pqX77yM6L+Z5piv5Zug5Li655S154Gv55qE5a6e6ZmF5Yqf546H5Y+Y5bCP77yM5pWF6YCJQy4=

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4/5单选题

难度：

4.甲、乙两个灯泡分别标有“220V 60W”和“220V 100W”字样，现将它们串联接在220V的电路中，它们的实际电功率之比为（　　）

A	1:1
B	3:5
C	5:3
D	2:5

提示1：: 5Zyo5Liy6IGU55S16Lev5Lit77yM55S15Yqf546H5ZKM55S16Zi75oiQ5q2j5q+U

提示2：: 5qC55o2u6aKd5a6a55S15Y6L5ZKM6aKd5a6a55S15Yqf546H5YWI5rGC6Kej5Ye655S16Zi755qE5aSn5bCP77yM5YaN5qC55o2u55S15Yqf546H5LmL5q+U562J5LqO55S16Zi75LmL5q+U77yM5rGC6Kej562U5qGI

正确答案：Qw==

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5/5多选题

难度：

5.将标有“220V100W”字样的灯泡接入110V的电路中时（忽略温度对灯丝电阻的影响）下面说法正确的是（）

A	灯泡的额定功率为25W
B	灯泡的额定功率为100W
C	灯泡的实际功率为25W
D	灯泡的实际功率为50W

提示1：: 5qC55o2u55S16Zi75ZKM5a6e6ZmF55S15Y6L55qE5aSn5bCP5rGC6Kej5Ye654Gv5rOh55qE5a6e6ZmF55S15Yqf546H

提示2：: 5qC55o2u6aKd5a6a55S15Y6L5ZKM6aKd5a6a55S15Yqf546H5YWI5rGC6Kej5Ye655S16Zi755qE5aSn5bCP77yM5YaN5qC55o2uUDxzdWI+5a6ePC9zdWI+PVU8c3ViPuWunjwvc3ViPjxzdXA+Mjwvc3VwPi8gUu+8jOaxguino+WHuuWunumZheeUteWKn+eOhw==

正确答案：QixD

VTxzdWI+6aKdPC9zdWI+PTIyMFbvvIxQPHN1Yj7pop08L3N1Yj49MTAwV++8jFU8c3ViPuWunjwvc3ViPj0xMTBW77yM5q2j5bi45Y+R5YWJ5pe254Gv5Lid55qE55S16Zi777yaUj1VPHN1Yj7pop08L3N1Yj48c3VwPjI8L3N1cD4vUDxzdWI+6aKdPC9zdWI+ID0oMjIwVik8c3VwPjI8L3N1cD4gLzEwMFcgPTQ4NM6p77yb5b2T5a6D5o6l5YWlMTEwVueahOeUtei3r+S4reaXtu+8jOeBr+azoeWunumZheWKn+eOh++8mlA8c3ViPuWunjwvc3ViPj1VPHN1Yj7lrp48L3N1Yj48c3VwPjI8L3N1cD4vIFIgPSgxMTBWKTxzdXA+Mjwvc3VwPi8gNDg0zqkgPTI1V++8juaVhemAiUJDLg==

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