Research On The Difficult Problems Of Senior High School Students' Learning In Electromagnetism

Physics is usually considered one of the most difficult subjects to study in high school,The study of electromagnetism is no exception;?General high school physics curriculum standard(2017 edition)?proposes to implement the core accomplishment of physics from the aspects of physics concept,scientific thinking,experimental inquiry,scientific attitude and responsibility,It is suggested that the physical concepts and scientific thinking formed in class should be applied to the solution of practical problems,and students' core accomplishment in physics should be cultivated in the process of solving problems,It emphasizes that the solution of problems is not only to "get the answers",but more importantly,to improve students' ability to solve problems,It is very necessary to explore the difficult problems and their causes and countermeasures in the learning process of electromagnetism.Based on the current research status at home and abroad,based on the relevant research,a questionnaire was designed to investigate the difficult problems in high school physics,and high school students from two high schools in qin 'an county were investigated,The questionnaire is based on the knowledge points of electromagnetism in compulsory course 3 and optional compulsory course 2 series.In this study,SPSS software was used to analyze the survey results,The results showed that the consistency coefficient of the questionnaire was 0.975,and the KMO measurement was 0.936,indicating that the reliability and validity of the questionnaire were good.through the questionnaire analysis,electromagnetism modules each knowledge to student's difficulty degree,so as to find out students' electromagnetic problems in the learning process,and summarizes some characteristics of the problems.At the same time,descriptive statistics and difference analysis were carried out on the questionnaires of students of different schools and genders,and the similarities and differences of difficult problems of students of different schools and genders were compared.The second questionnaire survey is mainly to investigate the possible causes of difficulties in electromagnetic learning for students.Combined with the characteristics of difficulties,this study summarizes the causes of difficulties in electromagnetic learning for students.According to the causes of difficult problems,the interview outline was designed to interview the teachers.Combined with the interview with the teachers and the relevant literature,the countermeasures to solve the difficult problems in high school students' electromagnetic learning were summarized,and the teaching design was carried out according to the countermeasures.Through the analysis of the students' questionnaire,it is found that there are some difficult problems in the students' learning: Dynamic analysis of the circuit,Understanding of the relationship between terminal voltage and load,Cyclotron principle,The motion of charged particles in an electric field,Superposition problem of electric field intensity,The motion of charged particles in a uniform magnetic field,Electric field distribution of conductor in static equilibrium state,Conversion of electricity meters,The application of lenz's law,The effect of inductance and capacitance on alternating current,Application of Faraday's law of electromagnetic induction,The capacitance of parallel plate capacitor and its influencing factors,The principle and law of transformer,The problem of electrostatic force doing work,Closed circuit U-I image problem,Characteristics and understanding of electric field lines,Measure the electromotive force and internal resistance of the power supply,Expressions and understanding of ohm's law for closed circuits,Mutual inductance and self-inductance phenomena and their causes,Content expression and understanding of Faraday's law of electromagnetic induction,Calculation of ampere force and determination of its direction,The principle of multimeter,Plot the volt-ampere characteristic curve of a small bulb,The volt-ampere characteristic curve of a conductor,The variation of sinusoidal alternating current.The causes of difficult problems in high school students' learning of electromagnetics are as follows:(1)the difficulty factors of subject knowledge,including knowledge abstraction,difficulty in the application of laws,difficulty in the construction of physical models,and certain requirements on mathematical ability;(2)students' own factors,including: lack of physical learning motivation,students do not develop good learning habits,poor logical thinking ability,poor physical foundation,Gender factors;(3)school factors,including: school teaching equipment arrangement is not in place,school schedule is insufficient;(4)teacher factors,including: The teaching methods are not rich enough,The actual teaching is not in line with the students' academic situation.The solutions to difficult problems are as follows:(1)To enhance students' motivation and confidence in physics learning;(2)Cultivate students' good study habits in a targeted way;(3)Attach importance to the role of deep perception in understanding the laws of electromagnetism;(4)Realize the transfer and application of physical knowledge in the form of "analogy";(5)To establish diversified evaluation and feedback on the teaching process of difficult problems.