Guiding students towards an understanding of the electromotive force concept in electromagnetic phenomena through a teaching-learning sequence

Zuza, Kristina; Cock, Mieke De; Kampen, Paul van; Kelly, Thomas; Guisasola, Jenaro

doi:10.1103/physrevphyseducres.16.020110

Cited by 16 publications

(6 citation statements)

References 27 publications

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“…According to relevant research results, the battery balance EMF (electrodynamic force) and battery SOC have a fixed monotonic non-linear functional relationship [32,33]. After fully standing still, the battery OCV (open circuit voltage) is approximately equal to the battery balance EMF.…”

Section: Open Circuit Voltage (Ocv) Of Lithium Iron Phosphate Batterymentioning

confidence: 99%

The Influence of Temperature on the Capacity of Lithium Ion Batteries with Different Anodes

Wang

et al. 2021

Energies

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Temperature is considered to be an important indicator that affects the capacity of a lithium ion batteries. Therefore, it is of great significance to study the relationship between the capacity and temperature of lithium ion batteries with different anodes. In this study, the single battery is used as the research object to simulate the temperature environment during the actual use of the power battery, and conduct a charge and discharge comparison test for lithium iron phosphate battery, lithium manganate battery and lithium cobalt oxide battery. In the test of capacity characteristics of lithium ion batteries of three different cathode materials at different temperatures, the optimal operating temperature range of the lithium ion battery is extracted from the discharge efficiencies obtained. According to the research results, the discharge capacity of a lithium ion battery can be approximated by a cubic polynomial of temperature. The optimal operating temperature of lithium ion battery is 20–50 °C within 1 s, as time increases, the direct current (DC) internal resistance of the battery increases and the slope becomes smaller. Between 1 s and 10 s, the DC internal resistance of the battery basically shows a linear relationship with time. In the charge and discharge process, when state of charge (SOC) 0% and SOC 100%, the internal resistance of the battery is the largest. The SOC has the greatest impact on the polarization internal resistance, and the smallest impact on the ohmic internal resistance.

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Section: Open Circuit Voltage (Ocv) Of Lithium Iron Phosphate Batterymentioning

confidence: 99%

The Influence of Temperature on the Capacity of Lithium Ion Batteries with Different Anodes

Wang

et al. 2021

Energies

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“…However, it is difficult to explain concepts using the content knowledge for students, especially the concepts related to electromagnetism, regardless of age group (Beer, 2010). Additionally, studies in physics education focus on the topic of mechanics but electromagnetism attracts less attention (Dori & Belcher, 2005;Zuza, De Cock, van Kampen, Kelly & Guisasola, 2020).…”

Section: The Role Of Rubrics In Students' Learningmentioning

confidence: 99%

Development and use of a rubric to assess undergraduates’ problem solutions in Physics

Kocakülah

2022

Participatory Educational Research

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The aim of this study is to develop and apply a rubric to evaluate the solutions proposed for questions about electromagnetic induction belonging to university second year pre-service teachers. In this study which has pretest-posttest quasi-experimental design with control group, teaching of the topic of electromagnetic induction was applied to both groups with the same teaching method and a test consisting of four questions was applied before and after the teaching. 73 students in the experimental group were informed about the properties and usage of rubrics and asked to create a rubric. The effect of rubric on the success of students was examined by applying descriptive statistics and t-tests to the scores obtained from both tests. The validity and reliability of the scoring with rubric were analyzed by calculating the linear regression, t-test statistics, Pearson correlation, Intraclass correlation and Cronbach-alpha correlation coefficients. The results of the analyses show that the developed rubric was used consistently by the researcher and an independent coder and there was a high and significant (p=.000) relationship between the scores for all questions. In the inter-rater reliability analysis for each question, the lowest ICC coefficient was specified as .826. In light of the findings obtained from the study, it was concluded that the developed rubric helped to make consistent and stable ratings independent of the scorer, to determine the characteristics of the problem solutions and to increase the level of achievement of students. Another type of analytical rubric can be created and used for other topics of the area of Physics and the results can be compared with the findings of this study.

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“…3), without resistance external to the battery (I = Ɛ/r = 10/2 = 5A) and finally the terminal voltage's value results from the Equation 2 (V term = Ɛ -I•r = 10 -5•2 = 0V). From the discussion with the students it was confirmed [11], that several of them consider that potential difference between the terminals of the battery is conceptually the same as the battery emf and give to emf the same properties as the potential difference, which leads to not distinguishing between the role played by the emf and by the potential difference in the context of electrical circuits.…”

Section: Fig 2 the Potential Difference And The Electromotive Forcementioning

confidence: 99%

“…Not a clear understanding of the concepts emf and potential difference. It is confirmed [11] that many students try to use science-based arguments without really showing they know the difference between emf and potential difference and what exactly the terminal voltage in a dc electric circuit means. 2.…”

Section: Questionmentioning

confidence: 99%

High School Students’ Difficulties and their Causes due to the Electromotive Force, in the Study of Direct Current Simple Electric Circuits

Vavasis

Kapotis

Tombras

2022

Int. J. Recent Contrib. Eng. Sci. IT

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This work is part of a larger research, conducted in Greece, about the students' difficulties in understanding the concepts and phenomena of Electricity. The goal of this study is to present the high school students’ difficulties and their causes into the study of basic direct current (dc) circuits, due to the concept of the electromotive force (emf). Researches in over the world have highlighted that the concepts of the emf and the potential difference (pd) create many problems to the students in the study of dc circuits. These difficulties are presented, analyzed and is made an attempt to identify their causes. The results show that, in addition to confirming the existing literature enriched with new findings, to address these difficulties is necessary the development of a teaching approach based on an education model with a new curriculum, where needed (in Greece, for example) and an appropriate education material so that to overcome the lack of understanding of the concepts and laws shown by the students.

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Guiding students towards an understanding of the electromotive force concept in electromagnetic phenomena through a teaching-learning sequence

Cited by 16 publications

References 27 publications

The Influence of Temperature on the Capacity of Lithium Ion Batteries with Different Anodes

The Influence of Temperature on the Capacity of Lithium Ion Batteries with Different Anodes

Development and use of a rubric to assess undergraduates’ problem solutions in Physics

High School Students’ Difficulties and their Causes due to the Electromotive Force, in the Study of Direct Current Simple Electric Circuits

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