
CH7 电的应用(串联和并联)
Authored by ET CHNG
Biology, Physics, Science
7th - 9th Grade
Used 3+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
有一条导线长6m,它的电阻值为5Ω。
如果把它剪掉一半长度,
则它的电阻值________。
一定大于5Ω
一定等于5Ω
一定小于5Ω
上述三种情况都有可能
2.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
两个电阻连接后其等效电阻为2Ω,
则它们的连接方式可能为______。
(多选题)
5Ω和5Ω的电阻串联
10Ω和5Ω的电阻并联
1Ω和1Ω的电阻串联
6Ω和3Ω的电阻并联
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如图所示,为了能控制灯,
开关接入的位置是______。
一定是A处
一定是B处
一定是C处
A、B、C处都可以
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如图所示的电路中,电源两端电压保持不变,R1=10Ω,R1<R2,R3的变化范围是0-20Ω.当滑动变阻器的滑片P在a端时,电流表的示数为0.36A.那么,当滑动变阻器的滑片P在b端时,电流表的示数可能是_______。
0.16A
0.26A
0.36A
0.46A
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如图所示,电源电压不变,当开关S闭合时,
电流表、电压表的变化不正确的是______。
电流表1的示数变小
电流表1的示数变大
电流表2的示数不变
电压表的示数不变
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