2012年人教版高中物理选修3-5 18.1电子的现练习卷(带解析)

适用年级:高二
试卷号:666415

试卷类型:课时练习
试卷考试时间:2017/8/16

1.选择题(共1题)

1.



Dear Reader,
    Imagine an 11-year old girl whose days are often spent washing clothes, looking after a baby, working hard in the field.
    Imagine a little girl who knows there will not be enough food for dinner, who can't fill her stomach with water because it's polluted, and who has watched life slip away from her father, little brother and sister because the family is too poor to see a doctor.
    Is it hard to believe? For Maria Pastora, these are the real life.
    Maria would gladly walk miles to school, but her mother, now alone, needs her badly at home. If Maria grows up without any schooling, what will be her future?
    But for just 52 pennies a day, you can sponsor a child like Maria. Through “Save the Children”, you can help Maria’s mother get the tools and ways she needs to turn their poor food into a good dinner and the money she needs to buy clothes and school things for Maria.
To help Maria most, your money is put together with that of other sponsors, so hard-working people can help themselves. Build a school, a hospital…bring in clean water. This is what “Save the Children” has been about since 1932.
    For you there are many rewards. Have the chance to write to or hear from your sponsored child. Receive photos or progress reports. Know you are reaching out to another person. Not with a handout(施舍物), but a “handup”. That's how “Save the Children” works. But without you, it can't work. Please take a moment now to fill in and post the form below to help a child like Maria and her village.
It can make such a difference in her life and yours.

2.多选题(共2题)

2.
如图所示,一只阴极射线管,左侧不断有电子射出,若在管的正下方放一通电直导线AB时,发现射线的径迹向下偏,则()

A. 导线中的电流从A流向B
B. 导线中的电流从B流向A
C. 若要使电子束的径迹向上偏,可以通过改变AB中的电流方向来实现
D. 电子束的径迹与AB中的电流方向无关
3.
关于阴极射线的性质,判断正确的是()
A.阴极射线带负电
B.阴极射线带正电
C.阴极射线的比荷比氢原子比荷大
D.阴极射线的比荷比氢原子比荷小

3.解答题(共1题)

4.
如图所示,有一电子(电荷量为e,质量为m)经电压U0加速后,进入两块间距为d,电压为U的平行金属板间。若电子从两板正中间垂直电场方向射入,且正好能穿过电场,

求:(1)金属板AB的长度L;(2)电子穿出电场时的动能Ek
试卷分析
  • 【1】题量占比

    选择题:(1道)

    多选题:(2道)

    解答题:(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:1

    7星难题:0

    8星难题:0

    9星难题:2