QuestionsCh31

QuestionsCh31 - CHAPTER 31: Maxwells Equations and...

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CHAPTER 31: Maxwell’s Equations and Electromagnetic Waves Responses to Questions 1. The magnetic field will be clockwise in both cases. In the first case, the electric field is away from you and is increasing. The direction of the displacement current (proportional to E d dt Φ ) is therefore away from you and the corresponding magnetic field is clockwise. In the second case, the electric field is directed towards you and is decreasing; the displacement current is still away from you, and the magnetic field is still clockwise. 2. The displacement current is to the right. 3. The displacement current is spread out over a larger area than the conduction current. Thus, the displacement current produces a less intense field at any given point. 4. One possible reason the term 0 E d dt ε Φ can be called a “current” is because it has units of amperes. 5. The magnetic field vector will oscillate up and down, perpendicular to the direction of propagation and to the electric field vector.
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This note was uploaded on 03/22/2009 for the course PHY 54L taught by Professor Thomas during the Spring '09 term at Duke.

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QuestionsCh31 - CHAPTER 31: Maxwells Equations and...

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