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8 電磁 I

8 電磁 I. What causes the “ s parking” of a wintergreen lifesaver?. 電磁學 (Electromagnetism). 電學 （ Electricity ） 1. 靜電荷 、 電力與電場 2. 靜電的應用 3. 電位與電容 器 4. 電流與電阻 5. 電路. 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. 摩擦充電 塑膠棒（負荷電）與毛皮（正荷電）

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8 電磁 I

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  1. 8 電磁 I What causes the “sparking” of a wintergreen lifesaver?

  2. 電磁學(Electromagnetism) 電學（Electricity） 1.靜電荷、電力與電場 2. 靜電的應用 3. 電位與電容器 4.電流與電阻 5.電路

  3. 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）

  4. 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

  5. 摩擦充電

  6. 感應充電

  7. The Electric Interaction

  8. Coulomb’s Law

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

  10. Millikan’s Oil Drop Experiment • Quarks:

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

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

  13. 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

  14. 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。

  15. 1.2 電場與場線 • （electric field） （Lines of force）

  16. 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

  17. 點電荷

  18. 帶電平板

  19. 二正電荷與電雙極 q0

  20. 電場的計算 • 電雙極 • 均勻帶電圓環 • 均勻帶電圓盤

  21. 電雙極

  22. 兩電荷的電場相加

  23. 電雙極的電場

  24. 均勻帶電圓環

  25. 均勻帶電圓環的電場

  26. 極限情形 • If z » R,

  27. 均勻帶電圓盤

  28. 均勻帶電圓盤的電場

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

  30. Ink-Jet Printing

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

  32. An ink drop with

  33. Soil Decontamination and Electroplating

  34. Electromagnetic Predators

  35. 電磁掠食者

  36. The torpedo ray and electric eel

  37. Electroplaques

  38. Electric Precipitator

  39. 影印機

  40. The copying process

  41. Laser Printer

  42. A RAM Chip

  43. 電容式鍵盤

  44. 電容式麥克風

  45. 心電圖和腦波圖

  46. 視網膜電圖

  47. Automatic Coffee Maker

  48. Bimetallic Strip Flasher and 3-way Light Bulb

  49. Electrical Grounding

  50. 敬請期待電、磁、近代物理

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