An Assessment Study On The Formation Of Coulomb’s Law In High School Students Under The History Of Electromagnetics

In high school physics teaching,concept and law teaching is highly valued by teachers,to improve students’ physical concept and law formation level is also the teacher’s ardent expectations.Therefore,based on the development history of electromagnetism,this research attempts to sort out the materials of the development history of Coulomb’s law from the original state when Coulomb’s law was created,taking the materials of the development history of Coulomb’s law as the scene,to compile a test paper on the formation of Coulomb’s law,and to conduct a study on the formation level of Coulomb’s law.The research was carried out in the following three parts:Part Ⅰ: Reading books and literature,referring to the theories of the formation of physical concepts and laws at home and abroad,based on the history of electromagnetism,collating the historical context of the formation of Coulomb’s law,the material of the development history of Coulomb’s law is selected and compiled.Then,according to the physical concepts and laws,the horizontal framework is formed,and the Coulomb’s law forms the horizontal score table and the Coulomb’s law forms the two-way itemization table of the test paper,based on the development history of Coulomb’s law,the paper is designed to form a test paper,collect teachers’ opinions and suggestions on the test paper,and revise the test paper,this paper analyzes the consistency of the content subject and formation level between the modified Coulomb’s law form test paper and the material of development history,and finally obtains the Coulomb’s law form test paper.Part Ⅱ: The Practical Test was conducted among 644 students of Senior 2 and Senior 3 in four schools in Nanning and Qinzhou,Guangxi province.The raw data of the test results were recorded with Excel,the result of the test paper formed by Coulomb’s law is calculated,and the result of the test paper formed by Coulomb’s law is statistically analyzed with SPSS software.The result shows that the overall difficulty coefficient of the test paper formed by Coulomb’s law is 0.652,and the difficulty is moderate,the difference is significant,there is differentiation degree,and the correlation is significant,which can be used to study the formation level of Coulomb’s law.Through the Coulomb’s law formation test paper results of statistical analysis:(1)The average score of all the students was 39.71,which accounted for 65.10%of the total score of 61 in the test paper.The students’ formation level of Coulomb’s law was moderate.The standard deviation of all the students’ scores was 12.244,and the coefficient of difference was 30.83%,which indicated that the students’ scores were discrete.The average scores in Nanning and Qinzhou were similar at 39.13 and 40.81,higher at 45.30 and highest at 45.58.According to the proportion of people who know,understand and can do the Coulomb’s law,the proportion is 98.76%,91.46% and 45.34%respectively.(2)By analyzing the differences of different groups in the form of standard scores,we get that the formation level of Coulomb’s law is different in knowing,understanding and doing The formation level of Coulomb’s law is higher than that of the history class of the sophomore year in a school,and the formation level of the law is higher in C school than in D school in Qinzhou.(3)The results of the statistical test showed that the proportion of the people who reached the four dimensions of physical concept,scientific thinking,scientific inquiry,scientific attitude and responsibility were 74.79%,70.54%,56.02% and 51.55%respectively.The development of the subject’s physical core literacy was better in the two dimensions of physical concept and scientific thinking.The two dimensions of scientific inquiry and scientific attitude and responsibility need to be strengthened.(4)By analyzing the causes of the errors in the test paper of Coulomb’s law,the article summarizes the interfering factors of Coulomb’s law,such as fuzzy concept understanding,lack of perceptual knowledge,lack of basic knowledge and so on.According to the statistics of the proportion of the students who made wrong choices in the relevant subjects,it was found that the proportion of the students who were influenced by the factor of“Lack of perceptual knowledge” was the highest(61.96%).After further statistics,it was found that the knowledge level score was most affected by the factor of“Lack of basic knowledge”(48.45%)The score of understanding level was most disturbed by the factor of“Lack of perceptual knowledge”(61.96%),and the score of ability to do level was most disturbed by the factor of“Abstract thinking ability”(39.96%).Part Ⅲ:According to the test paper and the process of physical concept and Law Formation,a questionnaire about the understanding of the nine levels of the test paper and the factors influencing the formation of law was designed.According to the Likert scale,the average score of family background is 3.43,which indicates that family background is the most important factor influencing Coulomb’s law The average scores of“Modeling,applying,expanding,reasoning,comparing,explaining and recognizing”in the intelligence factors are all greater than 3,which indicates that the students can understand and accept the questions of these seven levels in the formation test of Coulomb’s law.On the whole,most of the questions on the test paper formed by Coulomb’s law were well understood by the students.