Magnet and Electromagnet Teaching Aids’Design and Measuring

• Main Authors: SU,SING-WEI, 蘇星瑋
• Other Authors: HE,HUEI-YING
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/gnh4fs

碩士 === 國立臺北教育大學 === 自然科學教育學系 === 105 === The purpose of this study is to develop a teaching aid for magnetic courses. The teaching aid combines part of the primary and secondary course contents. The materials of the teaching aid that we selected must be cheap and easy to buy because we hope students can make teaching aids by themselves. The design of this teaching aid includes three major parts: (1) to verify that the attractive and repulsive forces between two magnets are equal under the same condition of fixing distance between them; (2) to explore the factors which affect the strength of a electromagnet; (3) to verify the right-hand rule which can show the interaction between a magnet and a straight wire which is caring current. After testing and modifying for several times, the final module of our teaching aid already can show the following results: (1) Since the data (average value  standard derivation) of the attractive and repulsive forces are overlap, we could say that the actual values of attractive and repulsive forces are the same; (2) The data shows that the strength of a electromagnet is affected by current, number of coils, material of the core and the size of core. (3) The experimental phenomenon can verify the right-hand rule. We think that this teaching aid can be use in each K-12 level. The user can design their own teaching material which includes the hands-on experiment by using this teaching aid.