The Application Of Geometric Thought In The Self-editing Test Of Physical Electromagnetics In High School

In 2017,the "General Physics Curriculum Standards(2017 Edition)" issued by the Ministry of Education(hereinafter referred to as "the new curriculum standards")first proposed the "core literacy",clearly stated that the core literacy of the discipline is the embodiment of the value of the subject education,is the student The key capabilities that are available.This shows that the new curriculum standards put forward higher requirements for students’ abilities.The examination is a form of evaluation and measurement of education.Through examinations,students’ abilities and qualities are examined.Under the core literacy,there are new high requirements for the reliability,validity,difficulty,discrimination,novelty and physical situation of the examination.Therefore,there are higher requirements and standards for the test questions.The current teaching materials in the market are basically adapted according to the college entrance examination questions.The students practice the adaptation questions without the reliability,validity,difficulty,discrimination and so on.In this context,the preparation of the questions should be original.For the first time in the new curriculum standards,the electromagnetic knowledge is divided into two sections for cyclic learning.It can be seen that electromagnetic knowledge is an important part of high school physics.This paper proposes a new method for the preparation of original test questions for electromagnetic content.This paper can understand the importance and status of electromagnetic content to the college entrance examination by analyzing the new curriculum standards and examination outlines.Through the analysis and research of the 2014-2018 national college entrance examination physics calculations,the content of the finale examination is mainly mechanics and electromagnetics.The calculation form of the electromagnetic part is mostly based on the application of charged particle type and electromagnetic induction phenomenon.This paper mainly discusses the method of life-based particle type calculation.The motion patterns of charged particles fall into two categories:linear motion and curved motion.According to the conditions of the title,when the external force of the particle is zero,the linear motion or stationary is uniform;when the external force is constant,the direction of the initial velocity and the external force can be divided into the uniform linear motion and the projectile motion.Among them,there are special types of flat throwing motion and uniform circular motion.The physics of charged particles in a uniform magnetic field for uniform circular motion,that is,the Lorentz force provides the law of centripetal force and the kinematics of circular motion,but this type of problem is very troublesome for students to know how to start.There are two reasons for the root cause.One is that you can’t draw a trajectory,you don’t know how to find the center of the circle.The other is that the trajectory is drawn and you don’t know how to find the geometric relationship.The difficulty is thus mathematical knowledge,not physical knowledge.The mathematical knowledge points in the examination of the statistical electromagnetic test questions include functions,inequalities,straight lines in geometric figures,circles,triangles,quadrilaterals,quadratic equations,and so on.The main contents of this article are as follows:1.Study the results of the physical and electromagnetic test of the college entrance examination,and the significance of studying the physical electromagnetic test of the college entrance examination;2.Study the measurement basis,psychological foundation,"Physical Curriculum Standards(2017 Edition)" course objectives and proposition suggestions,"Test Description" assessment objectives and requirements and test content and requirements,and study electromagnetic Analysis of the status of the content in the "Physical Curriculum Standards"(2017)and "Examination Notes";3.The third part focuses on the analysis of the distribution,the number of occurrences,and the proportion of the scores of the physical electromagnetic test questions of the national college entrance examination;4.The fourth part is the analysis of the test of charged particles moving in the magnetic field;5.The fifth part is to consult the plane geometry knowledge to integrate the idea of combination of numbers and shapes into the model of physical test questions,and to make physical electromagnetic test questions.By summarizing the geometric idea of moving particles in the electromagnetic field,constructing the particle trajectory model through the geometric test model is an innovative point in this paper.It is hoped that the results of this research will open up the thinking of middle school physics teachers to make electromagnetic test questions,and construct the particle motion trajectory from the perspective of geometric thinking.It also provides students with a way to answer electromagnetic questions.At the same time,it is instructive for follow-up researchers.