The experiment in which diode volt-ampere characteristics are tested via a voltlammetry method is an appropriate teaching content for students in the transition from secondary edueation to higher education due toits simple cireuit ,convenient operation and understandable principle.ln this work , the influences of temperature and meter eonnections in the experiment are studied to help people understand the experimental prineiple as well as improve the teaching quality. lt is suggested that the current flowing through the diode should be limitedto reduce the experimental error introduced by temperature rise.The experimental error is much smaller when the ampere meter is connected outside the voltmeter-diode loop, After math ematieal trealments by introducing the internal resistances of the meters , the experimental results measured when the ampere meter is connec tecinside the voltmeter-diode loop are similar to those when the ampere meter is connected outside the voltmeter. diode loop.The analyses of the experimental results and the oretieal formula show that the ideal current-voltage relationship in positive biased PN junction is not suitable for practical diodes.

In order to further study the motion laws of the particle on the semi-cireular orbit,the whole motion ofthe small ball as a particle,from the entrance of a vertical and smooth semicircle inner track to the landing point ,isdiscussed.By mathematical method ,the dimensionless conditional factor related to the initial velocity is delined .andthe conditional factor is used as the independent variables to analyze the four phvsical quantities -the motion timefor the ball to adhere to the track ,the fight time in the air , the maximum rising height and the maximum horizontarange.Analysis reveals that under all possible values of initial velocity, the expressions for these four physicaquantities are all related to the conditional factor.This mathematical analysis provides a detailed deseription of themotion laws of particles on a semicireular inner track model, and its results can offer theoretical support forteaching,research ,and applications related to the semicircular inner track model of particles.

The Hall effeet is an important experiment for studying the electrical behavior of curent-carryingconduetors in an external magnetie field. Traditional manual measurement methods are limited by theexperimental accuracy and the operational errors, often resulting in the ineficieney and the insuficientaeeuracy.This study designs and implements an automatic measurement system for the Hall efect experimenthased on the 850 data aequisition deviee , the current sensor ,the Capstone soltware ,and the voltage sensor.Thesystem enables the real-time collection and the processing of experimental data, automatieally plotting therelationship curves between variables such as the Hall voltage, the conductivity voltage,the Hall current , andthe exeitation curent, providing the real-time feedbaek and the data visualization during the experiment.T'hrough the analysis of experimental data ,the key physieal quantities sueh as the Hall coelfieient.the carrierconeentration ,the conductivity ,and the carrier mobility can be further caleulated.This research not only offersan ellicient solution for preeise measurement in the Hall effeet experiment, but also provides an importantreferenee for advancing the reform of physies experimental teaching and the development of informationtechnology in education.

Young’ s double. slit interference ( YDSl) is an important content in the courses like Optics ,College Physics , and its basic principle is widely used in engineering technology. In this paper, YDSl experiment was simulated by programming with MA'TLAB, and the simulation results straightforwardly show the effects of theslit spacing, the distance between the slit and the receiving screen and the light wavelength on the YDSlP articularly, we simulated the YDSl experiment with the white light as a light source, based on which weshowed the color spectrum of dispersion induced by the interference , and the mechanism for the change of light intensity and spectral contrast, In addition, we further compared the simulation results of measuring there fractive index of transparent dielectric films when using, separately , monochromatie and white light as light sources , demonstrating the limitation of a monochromatic light source in the experiment, The simulation experiment performed in this work is of great significance not only for deepening students’ understanding on the light interference ,but also for enriching the teaching content of YDSl, and cultivating students’ scientific exploration literacy and improving their ability to analyze and solve problems using information technology.

The Frank-Hertz experiment is important for verifying the quantization of electron energy and is aclassie in recent physics experiments, However, the experimental results are generally limited by the experimental conditions and data processing methods. In this paper, Matlab soltware is used to calculate the first excitation potential of monatomie gas argon by segmented linear interpolation , three times Hermite inte rpolation and three times spline interpolation and ploting the curve of eight sets of measured data, and it is found that the curve fitted by three times spline interpolation is smoother and the consisency of the results is belter. Meanwhile ,the first exeitation potential of the gas argon is obtained by the quantum mechanics-based first nature prineiple caleulation, and compared with the experimental results, it is found that compared with the Perdew-Burke-Erzerhof( PBE ) generalized funetion, the first excitation potential calculated by using theHeyd-Seuseria-Emzerhof( HSE06 ) generalized function has a better agreement with the experimental value ,and the introduction of spin-orbit coupling leads to the cleavage of the energy level but does not change theexeitation potential significantly.

Measurements of the magnetoelectric conversion characteristics were carried out using a giant magnetoresistive ( GMR ) sensor, and the interval of linear relation between the output voltage and the magnetic induction intensity ( 0our-B) was obtained. The magnetic induction intensity on the mid-plumb line of the N.pole of the bar magnet and in the direction of the midline of the hoof opening of the horseshoe magnet were determined using a GMR sensor, Subsequently, a plot of B versus x( position) was plotted and it was found thatit could not be fitted well using the magnetic dipole model ( B ~ x~’ ) .Therefore , a modified magnetic dipole model , i.e., an equation derived by considering the magnet as a number of magnetie dipoles, was used to fit the data better, and can be reasonably explained.

The coeflieient of linear expansion is one of the important the rmophysieal properties of materials. which is widely used in engineering structure design, machinery manufacturing and other fields. Traditional measurement methods have problems such as low accuracy and great influence by external conditions. In orderto improve the reliability of the measurement data, a new instrument was designed to measure the linear expansion coelficient of an object using two methods at the same time. ln this experiment, the linear expansion of aluminum rods within a certain temperature range was measured by split-tip interferometry and single-slidifl raction ,and the data were processed by matlab, The experimental results show that the two methods can beearried out at the same time without interfering with each other, and the data obtained are relatively accurate, and the new instrument has the advantages of high measurement accuracy , good repeatability and convenicn operation , which provides an effective method for the study of thermal properties of materials.

The half-wave loss of light has an important efleet on the intererence pattern.Taking [loyd mirrorinterferenee and Newton ring equal-thickness interference as examples , the direetion of the electrie veetor of therelleeted light at the dieleetrie separation interface is explored, and the phenomenon of half-wave loss occurringin the interference device is analyzed. Based on the Python language, the fringe patterns of lloyd mirrorinterferenee and Newton ring equal-thiekness interferenee under different conditions are simulated , and theelfeet of the presenee or absenee of half-.wave loss on the interference fringes is demonstrated comparatively ina Newton ring device. The integration of computer programming language into theoretieal and experimentalteaching,and the visualization of theoretical formulas and experimental data can help to improve the teachingelfeet , deepen students’ understanding of the basie principles,and stimulate their innovative thinking.

Based on the demand for cultivating innovative talents in the new era and the current situation of physics experiment teaching , taking the application research experiment of mechanical vibration characteristics as an example , this paper conducts research on the development, curriculum design , teaching implementation. and evaluation of advaneed experimental projects, and expands the development of several advaneed experimental projects. The teaching praetiee effect shows that independently developed advaneed experimental projects can cliectively improve the quality of college physics experiment courses and enhance the ability olcourse education.

This experiment improves the ultrasonic velocity measurement instrument using a capacitive sensor ranging system．By controlling the capacitive sensor measures the data at the threshold voltage position through the output voltage of the piezoelectric transducer receiving sound waves，it achieves precise and automatic wavelength measurement，reducing human error and improving measurement efficiency． It is particularly advantageous when measuring the speed of sound in media with real-time changes in state．In the experiment，the first step was to investigate the impact of the threshold voltage on the experimental results．The results show that increasing the threshold voltage can improve measurement accuracy．When the threshold voltage is 11 V，the propagation speed of sound in air is，the relative uncertainty is，and the percentage deviation is．Compared to before the improvement，the relative uncertainty has decreased by，and the percentage deviation has decreased by．This experiment will provide strong support for research and application in related fields．