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III. 電磁學 ( Electromagnetism)

III. 電磁學 ( Electromagnetism). III.1 電學（ Electricity ） 1. 電力與電場（ electric force and electric field ） 2. 電位與電容 III.2 磁學（ Magnetism ） 1. 磁場與磁力線 2. 磁力 3. 電磁感應 4. 電磁波（ Electromagnetic waves ）. 1. 電力與電場. 1.1 庫倫定律 (Coulomb’s law ) 1.2 電場（ electric field ）與場線（電力線）. 1.1 庫倫定律.

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III. 電磁學 ( Electromagnetism)

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  1. III.電磁學(Electromagnetism) III.1 電學（Electricity） 1. 電力與電場（electric force and electric field） 2. 電位與電容 III.2 磁學（Magnetism） 1.磁場與磁力線 2. 磁力 3.電磁感應 4.電磁波（Electromagnetic waves）

  2. 1. 電力與電場 1.1 庫倫定律 (Coulomb’s law ) 1.2 電場（electric field）與場線（電力線）

  3. 1.1 庫倫定律 • 摩擦充電 • 塑膠棒（負荷電）與毛皮（正荷電） • 玻璃棒（正荷電）與絲綢（負荷電） • 感應充電 • Coulomb’s law

  4. 摩擦充電

  5. 感應充電

  6. The Electric Interaction

  7. Coulomb’s Law

  8. Charge is quantized • The electric charge (e) is discrete (quantized) • SI unit: coulomb (C), defined in term of ampere

  9. Millikan’s Oil Drop Experiment • Quarks:

  10. Charge is conserved • The radioactive decay • The annihilation process (對滅)

  11. Elementary Particles • The pair production process (對生) • The bubble (cloud) chamber

  12. Ex. 1-1 一庫倫負荷電含有多少電子 Ex. 1-2 氫原子內電子與質子之間電力與重力之比

  13. Ex. 1-3鐵（Fe26）原子核中，兩個相距一個原子核半徑的質子間之斥力 • R = 410-15m • 如此大之斥力，必須有更強的核力與之抗衡，方能維持原子核的穩定。

  14. 1.2 電場與場線 • （electric field） （Lines of force）

  15. 電場的定義 • 電力: q與q0之間的電力 or q在q0所建立的電場中受到的電力

  16. 點電荷

  17. 帶電平板

  18. 二正電荷與電雙極 q0

  19. 靜電的應用 • Ink-Jet Printing • Soil Decontamination • Electroplating • Electromagnetic Predators • Electric Precipitator • Xerography • Laser Printer

  20. Ink-Jet Printing

  21. The electric field on an ink drop A drop of R = 2.76m has 3 excess electrons,  = 920kg/m3

  22. An ink drop with

  23. Soil Decontamination and Electroplating

  24. Electromagnetic Predators

  25. 電磁掠食者

  26. The torpedo ray and electric eel

  27. Electroplaques

  28. Electric Precipitator

  29. 影印機

  30. The copying process

  31. Laser Printer

  32. A RAM Chip

  33. 電容式鍵盤

  34. 電容式麥克風

  35. 心電圖和腦波圖

  36. 視網膜電圖

  37. Automatic Coffee Maker

  38. Bimetallic Strip Flasher and 3-way Light Bulb

  39. Electrical Grounding

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