[TOC] # Chapter 5 - Electric Field in Material Space ## current in conductors :::spoiler current in conductors   ::: ## current 有兩種 :::spoiler 1. conduction current >  >  >  ::: :::spoiler 2. convection current 對流電流 >  ::: ## Conductor  ### Resistivity of Conductors   ### Joule's Law :::spoiler Power  ::: :::spoiler Power Density  :::  ## Continuity Equation  ## Relaxation Time  # Chapter 6 - Electrostatic Boundary-Value Problems Poisson's and Laplace's Equations 得到電場的三種方法 :::spoiler rho (向量場)  ::: :::spoiler 高斯 (向量場)  ::: :::spoiler V (純量場)  ::: 但是有兩種限制 :::spoiler  ::: 所以我們就要進入 Boundary-Value Problems 首先,從 Poisson's equation and Laplacian equation 開始 ## Poisson's equation :::spoiler Poisson's equation  ::: ## Laplacian equation :::spoiler Laplacian equation (Poisson's equation 的特例)  ::: ## Uniqueness theorem :::spoiler Uniqueness theorem     邊界條件常見型態  ::: ## Solving Poisson's or Laplace's equations :::spoiler  ::: ## Method of separable variables  然後討論 lamda>=<0 的情況 :::spoiler lamda>0  ::: :::spoiler lamda=0  ::: ## Solutions for 2D Laplace's equations Cartesian Coordinate System  beta<0,和beta>0,式子長的一樣  所以 V 有 2X2 種型態 或是  所以 V 有 2X2 種型態 所以   注意:要注意 possible complete solutions 不要寫成 invalid solutions # 心得 這段雖然數學偏重看似困難,但是實質上如果我們把過程看過,然後知道了過程以後忽視它,只記得她的結果的話,那麼就沒有想像中那麼難,主要是寫題目比較難。很開心最近稍微有一點漸入佳境的感覺了,加油 fighting!
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