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184_notes:q_enc [2018/07/24 15:19] – [Patterns of Electric Fields] curdemma | 184_notes:q_enc [2021/06/04 00:34] (current) – schram45 | ||
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Section 21.1 from Matter and Interactions (4th edition) | Section 21.1 from Matter and Interactions (4th edition) | ||
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===== Enclosed Charge ===== | ===== Enclosed Charge ===== | ||
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=== Sheets of charge === | === Sheets of charge === | ||
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Similar to the lines of charge, the electric field for a positive plate of charge points perpendicularly away (and perpendicularly toward the plate for negative charge) in the middle of the plate. Near the edges of the plate (similar to the line of charge) the electric field vectors change directions and magnitudes, making it much harder calculate. Typically, we will make //__the assumption that the charged plate is very large (or infinite) or that we only care about the field close to the center of the plate away from the edges__// | Similar to the lines of charge, the electric field for a positive plate of charge points perpendicularly away (and perpendicularly toward the plate for negative charge) in the middle of the plate. Near the edges of the plate (similar to the line of charge) the electric field vectors change directions and magnitudes, making it much harder calculate. Typically, we will make //__the assumption that the charged plate is very large (or infinite) or that we only care about the field close to the center of the plate away from the edges__// | ||
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==== Examples ==== | ==== Examples ==== | ||
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+ | * Video Example: Flux through a Cylinder on a Line of Charge | ||
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