1.单选题- (共4题)
A. 甲图中与点电荷等距的a、b两点
B. 乙图中两等量异种电荷连线的中垂线上与连线等距的a、b两点
C. 丙图中两等量同种电荷连线的中垂线上与连线等距的a、b两点
D. 丁图中非匀强电场中的a、b两点
A． | B． | C． | D． |
| A．所受电场力的方向变化 |
| B．所受电场力的大小恒定 |
| C．电场力一直做正功 |
| D．电势能先不变后减小 |
| A．场强的方向一定沿水平方向向右 | B．场强的方向一定沿水平方向向左 |
| C．场强的方向一定竖直向上 | D．场强的大小一定为E=5×103N／C |
2.选择题- (共3题)
阅读短文,下列问题
C
Hi, I'm Sandy. I come from America. I have long hair. I like listening to music and singing. I don't like sports. I often call my friends at the weekend.
My name is Jack. My Chinese name is Chen Tao. My eyes are not very good, so I often wear a pair of glasses. I enjoy playing computer games and swimming. I like making friends and I have a Chinese friend.
Hello, everyone. I'm Luo Wei. I'm from China. My hair is short. I love running and pets. And I have a lovely dog.
My name is Daniel. I come from England. I'm good at Maths. I often help my classmates with their Maths. I'm not very tall. I like playing computer games on the Internet. Would you like to be my friend? Please write e-mails to me.
3.解答题- (共1题)
【小题1】两板间至少要加U才能使电子恰不飞出电场？
【小题2】在上述电压下电子到达极板时的动能。
4.实验题- (共1题)
-
【1】题量占比
单选题:(4道)
选择题:(3道)
解答题:(1道)
实验题:(1道)
-
【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：0
7星难题：0
8星难题：6
9星难题：0