如图所示电路,通过小灯泡的电流方向为...
J2_第10章(上) 电路

Quiz
•
Science
•
7th Grade
•
Medium
W.Y. Tan
Used 41+ times
FREE Resource
12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
由a到b
由b到a
两种情况都可能
无法判断
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
金属导电靠______的定向移动,它定向移动方向与电流方向相反。(4个字)
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
物理学中把______电荷的定向移动方向规定为电流的方向。
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
负电荷移动的方向与电流方向 。
相同
相反
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
手电筒的构造如图所示,电源为两节干电池,下列说法正确的是。。。。
按键相当于开关
手电筒使用的是串联电路
弹簧为绝缘体
灯泡发光时,电能转化为化学能
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
用带负电的橡胶棒去靠近一个轻质小球,二者互相排斥。则小球的带电情况是。。。。
不带电
带正电
带负电
不带电或带正电
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如图所示的电路中,闭合开关S后,下列说法正确的是。。。
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