PDF《Resource Plus》

0625 This Skills Pack can also be used with the following syllabuses: ? Cambridge IGCSE? (9C1) Physics

0972 ? Cambridge IGCSE? Combined Science

0653 ? Cambridge IGCSE? Co-ordinated Sciences (Double Award)

0654 ? Cambridge IGCSE? (9C1) Co-ordinated Sciences (Double Award)

0973 ? Cambridge IGCSE? Physical Science

0652 ? Cambridge O Level Physics

5054 ? Cambridge O Level Combined Science

5129 面向整个课程和各单一知识领域的教学大纲,其中包括针对各知识点的推荐 教学活动. Syllabus ref. Learning objectives Suggested teaching activities 4.6.1 Electro- magnetic induction ? Show understanding that a conductor moving across a magnetic field or a changing magnetic field linking with a conductor can induce an e.m.f. in the conductor ? Describe an experiment to demonstrate electromagnetic induction ? State the factors affecting the magnitude of an induced e.m.f. This topic really must be demonstrated by experiment. One such includes moving a permanent magnet into and out of a coil, connected to a very sensitive meter. This can be extended to show the same effect using an electromagnet moved in and out of the coil and then by simply switching the electromagnet on and off. Extension activity: extend the experiments above to show the effects of the strength of the field (use a stronger permanent magnet or increasing the current in the electromagnet), the speed of movement and the number of turns per metre in the coil. Electromagnetic induction: www.ndt-ed.org/EducationResources/HighSchool/Electricity/electroinduction.htm www.youtube.com/watch?v=hajIIGHPeuU 4.6.1 Electro- magnetic induction ? Show understanding that the direction of an induced e.m.f. opposes the change causing it ? State and use the relative directions of force, field and induced current Induce a current in a solenoid by inserting a known pole at one end. Then pass a current through the solenoid in the same direction as the induced current;

show that the field opposes the original insertion of the magnet. There are various rules for remembering the relative directions of the force, field and induced current of which Fleming's right-hand rule is one. Lenz's law: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html#c2l www.youtube.com/watch?v=KGTZPTnZBFE http://video.mit.edu/watch/physics-demo-lenzs-law-with-copper-pipe-10268/ www.youtube.com/watch?v=uGUsTWjWOI8 互动性答题范例,可对照评分方案和考官点评进行上机审阅和评分. 针对每一个知识领域提供三个实验视频,其中包含一个供教师使用的 互动视频和一个为学生准备的虚拟操作视频.观看预告视频,请访问 www.cambridgeinternational.org/resourceplus Resource Plus (接上页) *1704039208*