ALevel物理考点：电场与电场力内容解析
提到Alevel历史学科，很多小伙伴都会不禁要吐槽惨绝人寰的历史essay，对大部分中国考生来讲，Alevel历史并不好学，也不容易得高分。今天我们就来了解一下Alevel历史考试信息，并且为大家提供一些备考建议。
学习内容：
Component 1:Breadth study
Component 2:Depth study
Component 3:Historical investigation(Personal study)
考试能力要求
The way the requirements of the question are interpreted读题能力
The quality of the arguments and the range/depth/type of material used in support分析能力
The presentation of the answer(including the level of communication skills)表达能力
The awareness and use of differing historical interpretations批判性思维
The degree of independent judgement and conceptual understanding shown独立思考能力
备考技巧
1、理解证据
2、证据出处
回答者对于证据出处的了解更能表现出答题者对于该时间段内事件的具体了解
3、效用和交叉引用
正确的引用不同来源论据，并强调出论据来源以及不同论据之间的不同，同样重要的是对比这些不同论据的相同之处，而且论据的来源也要作为答题的一部分。
4、答题结构，语境，直接证据
5、写简介
回答问题之前要有一个引言式的内容，在这个引言中，点题是它最主要的作用。
6、注意段落结构
1）申明观点
提出一个论点，最好是用议论性语言点题。最好不要用描述性语言，这就会引起一个描述性的段落。
2）解释
下一个段落，就要开始解释你的论点
3）证据
需要从自己所学的知识里寻找到论证这个论点的证据，并且还需要找到这个论据与论点的关联点。这些连接点越具体详细越好，所以仔细的寻找。
Sample essay：
The rule of the major-generals was perceived as harsh because it was associated with the brutal crushing of Penruddock’s Rising in Wiltshire in March 1655.Indeed the major-generals’experiment that followed had the effect of creating the legend of Cromwell as a military dictator.Equally damaging were the order received by the major generals including banning horse races,cock fighting and stage plays.The reaction against this experiment can be seen in Source B in which the historian,well informed and reliable,attacks the major generals as“the most intolerable experience England ever had”.
A-level考试培训
New
A-level OPENS
A-level预习
A-level
课程亮点
1
爱德思和AQA注册认证的考培中心
2
顾问1V1全方位指导，制定专属学习计划
3
使用原版教材和九天独家辅导资料
4
实体教学环境，沉浸式高效学习
学科
经济类
经济学、会计、商务
自然科学类
物理、化学、生物、科学
人文社科类
地理、历史、心理学、社会学
数学及计算机类
数学、高等数学、计算机科学
语言类
英文文学、英文语言、雅思
课程适合人群
1
适用阶段
（1）欲就读于英国或英联邦体系国际学校A-level阶段的学生
（2）有英语基础但对A-level认识不够全面的学生
A-level OPENS
2
学习收获
（1）课前顾问对学生学习能力1对1评估，量身打造课程，帮助学生充分完成课前预习
（2）课中导师双语沟通，对原版教材进行知识点精讲，帮助学生提前适应国外上课方式
（3）课后完成多样化作业并进行学术测试，班主任线上线下24小时答疑
A-level OPENS
ALevel物理考点：电场与电场力内容解析
在ALevel物理学习中，电场与电场力部分是考试中必考的一点，却也是很多同学们比较难理解的部分。今天小编就带大家相信解读一下这部分所设涉及到的ALevel物理考点内容，来帮助同学们加深这部分印象。
Part 1 Electric Field Shapes电场概念及表示
Electric Field
“An electric field is a region in which particles with charge experience a force”
Field Shape Diagrams
We represent electric fields with diagrams that have conventions(or rules)that need to be followed.
For example:
The field lines(and arrows)show the direction of the force that would be felt by a positive charge at that point in the field.Note that unlike gravitational fields,electric fields can attract or repel objects.
The spacing between the lines shows how strong the field is at that point.In this case it's strongest near to the charge because the lines are closest there.
This field is uniform because the spacing between the lines remains the same throughout the field shown.The field lines are parallel and equispaced.
Part 2 Electric field strength电场强度
This is defined as the force per unit charge acting at a point in the field.So an equation for it is:
Where:
E=electric field strength
F=force acting in newtons
q=the charge in coulombs
Units of E:NC-1 or Vm-1(these are the same thing!!)
(1)匀强电场Uniform Fields
There is one special example you also need to know:
This is a uniform field.The field strength at any point in this field is:
where
V=the pd between the plates
d=the distance separating the plates.
Field strength is a vector-it has direction as well as magnitude.
This is important to remember because in electric fields you can have field strengths acting in different directions due to different signs of charge.
Radial Fields
A particularly useful equation to find field strength around a point charge(note-the first pictures is the field diagram section were point charges)is:
where
Q=the charge causing the field
r=the separation between the charge and the point you are considering
ε=permittivity(see below for notes).
以上就是小编关于电场与电场力部分ALevel物理考点的解读，同学们可以作为在这部分复习中的参考。如果对于ALevel物理课程学习还有哪些不明白的，一定要及时反馈给国际课程老师，让老师一对一为你进行专项的课程辅导吧！
