参加过AP物理考试的同学都知道,AP物理课程主要有物理1、物理2、物理C力学、物理C电磁学四种,学习时间一般为两个学期。物理C力学是一门以计算为基础的力学、电学、磁学类入门课程,学习时间一般为三个学期以上。AP物理考试题型主要有单选、问答两种,考试时间为180分钟(每部分各90分钟)。
AP物理2主要考察两大块内容:牛顿力学、电磁学,这是作为物理学的经典内容,而物理C的难度是比较高的,需要有微积分基础,如果大家成绩较好,学有余力,那么还是建议考的,因为物理C的满分率高于物理1和物理2,可以用于换取学分。
AP物理的考试难度怎么样?与国内高中物理相比哪个更难?具体我们来看一道题。
In the diagram above, a nichrome wire of resistance per unit length λ is bent at points P and Q to form horizontal conducting rails that are a distance L apart. The wire is placed within a uniform magnetic field of magnitude B pointing into the page. A conducting rod of negligible resistance, which was aligned with end PQ at time t = 0, slides to the right with constant speed v and negligible friction. Express all algebraic answers in terms of the given quantities and fundamental constants.
Indicate the direction of the current induced in the circuit.
________Clockwise ________Counterclockwise
Justify your answer.
Derive an expression for the magnitude of the induced current as a function of time t.
Derive an expression for the magnitude of the magnetic force on the rod as a function of time.
The force pulling the rod is now removed. Indicate whether the speed of the rod increases, decreases, or remains the same.
________Increases ________Decreases ________Remains the same
Justify your answer.
通过上面两道题,同样是考查电磁学,但不难发现国外的AP物理考察得更加直观些,难度相对小一些。AP考试和国内高考都是面对高中生群体开设的课程。有相同也有区别。国内高考重视知识的积累,而国AP物理则重视理科思维的培养。
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