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Physics
Classical Physics
Electromagnetism
Grounded Means Zero Electric Potential: Exploring the Method of Images
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[QUOTE="BvU, post: 6851313, member: 499340"] HI, It's all mathematics. A solution of the Laplace [URL='http://teacher.pas.rochester.edu/PHY217/LectureNotes/Chapter3/LectureNotesChapter3.html']equation is unique[/URL]. The math is reasonable when good use is made of infinity. So for your #1 question: to keep the math from becoming unpleasant. #2: If the plane is conducting and not grounded and not neutral, it contributes to the electric field and needs to be taken into account. Its surface is still an equipotential surface, though. That's just a conventient convention. All physics is independent of the choice of zero potential. Often infinity is chosen (but sometimes that doesn't work, for instance with the electric field of an infinitely long wire charge). Yes ! That's the fun of the image method. And quite useful, to boot! ##\ ## [/QUOTE]
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Physics
Classical Physics
Electromagnetism
Grounded Means Zero Electric Potential: Exploring the Method of Images
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