
初二下册第11章
Authored by 沈宛慧(古晋一中) 沈宛慧(古晋一中)
Science
9th Grade
Used 462+ times

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17 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在家庭电路中,断路器都需要接在_____________。
中线上
地线上
火线上
火线,地线,中线任何一条电线上
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如图所示,电路中画X处表示断路之处。若灯泡已经损坏无法通电,闭合开关后,用测电笔测试电路中A, B, C 三点,测哪个点时测电笔的氖管会发光?
A 点
B点
C点
每个点都会发光
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
总开关的作用与下列哪个元件相同?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
小悦家中的电灯不亮, 电冰箱等用电器也不工作, 但检查保险丝没有熔断, 用测电笔测试所有的导线接头及用电器时, 测电笔氖管均发光, 则他家的电路故障可能是
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列做法中, 符合安全用电原则的是
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如图所示的三孔插座, 与孔①相连的是
中线
火线
地线
以上三种都可以
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
两爪站在高压线上的鸟不会发生触电事故, 这是因为
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