本课配套习题挑战模式1/5
单选题
难度系数:
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 |
一次做对,真牛!
+5奖励规则>
- 提示1:MjIwVuaYr+ivpeeZveeCveeBr+eahOmineWumueUteWOi++8jDQwV+aYr+Wug+eahOmineWumueUteWKn+eOhw==
- 答案:Qw==
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本课配套习题挑战模式2/5
单选题
难度系数:
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 |
一次做对,真牛!
+5奖励规则>
- 提示1:54Gv5rOh55qE5Lqu5bqm5piv55Sx54Gv5rOh5bel5L2c5pe255qE5a6e6ZmF55S15Yqf546H5Yaz5a6a55qE77yM5a6e6ZmF55S15Yqf546H6LaK5aSn77yM54Gv5rOh6LaK5Lqu
- 答案:QQ==
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本课配套习题挑战模式3/5
单选题
难度系数:
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 |
一次做对,真牛!
+5奖励规则>
- 提示1:54Gv5rOh55qE5Lqu5bqm5piv55Sx54Gv5rOh5bel5L2c5pe25YCZ55qE5a6e6ZmF55S15Yqf546H5Yaz5a6a55qE
- 答案:Qw==
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本课配套习题挑战模式4/5
单选题
难度系数:
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 |
一次做对,真牛!
+5奖励规则>
- 提示1:5Zyo5Liy6IGU55S16Lev5Lit77yM55S15Yqf546H5ZKM55S16Zi75oiQ5q2j5q+U
- 提示2:5qC55o2u6aKd5a6a55S15Y6L5ZKM6aKd5a6a55S15Yqf546H5YWI5rGC6Kej5Ye655S16Zi755qE5aSn5bCP77yM5YaN5qC55o2u55S15Yqf546H5LmL5q+U562J5LqO55S16Zi75LmL5q+U77yM5rGC6Kej562U5qGI
- 答案:Qw==
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本课配套习题挑战模式5/5
多选题
难度系数:
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 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u55S16Zi75ZKM5a6e6ZmF55S15Y6L55qE5aSn5bCP5rGC6Kej5Ye654Gv5rOh55qE5a6e6ZmF55S15Yqf546H
- 提示2:5qC55o2u6aKd5a6a55S15Y6L5ZKM6aKd5a6a55S15Yqf546H5YWI5rGC6Kej5Ye655S16Zi755qE5aSn5bCP77yM5YaN5qC55o2uUDxzdWI+5a6ePC9zdWI+PVU8c3ViPuWunjwvc3ViPjxzdXA+Mjwvc3VwPi8gUu+8jOaxguino+WHuuWunumZheeUteWKn+eOhw==
- 答案:QixD
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