物理与光电工程学院：《大学物理》课程PPT教学课件（讲稿，英文第三版）Chapter 27 Electromagnetic Induction and Faraday's Law2

Chapter 27 Electromagnetic Induction and Faradays Law Chapter 27 Electromagnetic Induction and faraday's Law 1. The law of electromagnetic Induction (电磁感应定律) 2. Motional Induced emf (动生和感生电动势)

Chapter 27 Electromagnetic Induction and Faraday’s Law Chapter 27 Electromagnetic Induction and Faraday’s Law 1. The Law of Electromagnetic Induction (电磁感应定律) 2. Motional & Induced EMF (动生和感生电动势)

Chapter 27 Electromagnetic Induction and faraday's law New words and Expressions magnetic flux 磁通量 electromotive force(emf) 电动势 electromagnetic induction 电磁感应 induced current 感应电流 induced emf 感应电动势 motional emf 动生电动势 galvanometer 检流计,电流计

Chapter 27 Electromagnetic Induction and Faraday’s Law New words and Expressions magnetic flux 磁通量 electromotive force (emf) 电动势 electromagnetic induction 电磁感应 induced current 感应电流 induced emf 感应电动势 motional emf 动生电动势 galvanometer 检流计,电流计

Chapter 27 Electromagnetic Induction and faraday's law INTRUDUCTION After Oersteds discovery in 1820: a steady current produced a steady magnetic field, experimentalists eagerly sought to demonstrate the reverse: a steady magnetic field could create a steady electric current. 1820年丹麦物理学家奥斯特发现了电流的磁效应, 就开始了其逆效应的研究

Chapter 27 Electromagnetic Induction and Faraday’s Law After Oersted’s discovery in 1820: a steady current produced a steady magnetic field, experimentalists eagerly sought to demonstrate the reverse: a steady magnetic field could create a steady electric current. 1820年丹麦物理学家奥斯特发现了电流的磁效应， 就开始了其逆效应的研究。 INTRUDUCTION

Chapter 27 Electromagnetic Induction and faraday's law Michael Faraday, English physicist and chemist, whose experiments covered a wide range of electrical, magnetic, optical and chemical phenomena. He is best known for his discovery of electro-magnetic induction 2清 1831年8月英国物理学家 M. Faraday发现了电磁感应定律。大 大推动了电磁理论的发展。 电磁感应定律的发现,不但找到了磁生电的规律, 更重要的是它揭示了电和磁的联系,为电磁理论奠定了 基础。并且开辟了人类使用电能的道路。成为电磁理论 发展的第一个重要的里程碑

Chapter 27 Electromagnetic Induction and Faraday’s Law 电磁感应定律的发现，不但找到了磁生电的规律， 更重要的是它揭示了电和磁的联系，为电磁理论奠定了 基础。并且开辟了人类使用电能的道路。成为电磁理论 发展的第一个重要的里程碑。 1831 年 8 月 英 国 物 理 学 家 M.Faraday发现了电磁感应定律。大 大推动了电磁理论的发展。 Michael Faraday, English physicist and chemist, whose experiments covered a wide range of electrical, magnetic, optical and chemical phenomena. He is best known for his discovery of electro-magnetic induction

Chapter 27 Electromagnetic Induction and Faradays Law 27-1.Induced Phenomenon(page629-630 1. Electromagnetic induction 闭合电键L断开电鍵」 I变。B变

Chapter 27 Electromagnetic Induction and Faraday’s Law 27-1. Induced Phenomenon (page629-630) 1. Electromagnetic induction I变 B变

Chapter 27 Electromagnetic Induction and Faradays Law a changing magnetic field can produce an electric current! 1) Electromagnetic induction(电磁感应现象) The process to produce the current and emf is called induction 2) Induced current(感应电流) The current produced in the loop is called an induced current

Chapter 27 Electromagnetic Induction and Faraday’s Law 1) Electromagnetic induction (电磁感应现象): The process to produce the current and emf is called induction. 2) Induced current (感应电流) The current produced in the loop is called an induced current. A changing magnetic field can produce an electric current!

Chapter 27 Electromagnetic Induction and Faradays Law B变

Chapter 27 Electromagnetic Induction and Faraday’s Law B变

Chapter 27 Electromagnetic Induction and faraday's law 1)a current appears if there is a changing magnetic field 2)Faster motion produces a greater current. 3)The opposite moving direction causes an opposite current.(如果磁铁的运动方向相反,则产 生的电流方向相反)

Chapter 27 Electromagnetic Induction and Faraday’s Law 2) Faster motion produces a greater current. 3) The opposite moving direction causes an opposite current. (如果磁铁的运动方向相反, 则产 生的电流方向相反) 1) A current appears if there is a changing magnetic field

Chapter 27 Electromagnetic Induction and faraday's law 27-2. Faraday's Law of Induction (P630-634)

Chapter 27 Electromagnetic Induction and Faraday’s Law 27-2. Faraday’s Law of Induction (P630-634)

Chapter 27 Electromagnetic Induction and faraday's law 法拉第是英国物理学家、化学家 1791年9月22日萨里郡纽因顿一个贫苦铁匠家庭。 1813年3月由戴维举荐到皇家研究所任实验室助手,进 行化学研究。 1824年1月当选皇家学会会员,1825年2月任皇家研究 所实验室主任 1833-1862任皇家研究所化学教授。 1867年8月25日逝世 法拉第主要从事电学、磁学、磁光学、电化学方 面的研究,并在这些领域取得了一系列重大发现

Chapter 27 Electromagnetic Induction and Faraday’s Law 法拉第是英国物理学家、化学家. 1791年9月22日萨里郡纽因顿一个贫苦铁匠家庭。 1813年3月由戴维举荐到皇家研究所任实验室助手,进 行化学研究。 1824年1月当选皇家学会会员，1825年2月任皇家研究 所实验室主任. 1833--1862任皇家研究所化学教授。 1867年8月25日逝世。 法拉第主要从事电学、磁学、磁光学、电化学方 面的研究，并在这些领域取得了一系列重大发现