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PH 223 26:3-4

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by

Richard Datwyler

on 20 October 2016

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Transcript of PH 223 26:3-4

line on board

an infinite line of charge
"How long does a wire need to be in order to be modeled as infinitely long?"
"Plane and sphere charges, can't quite wrap my head around them. A plane of charge: "field strength is the same at all points in space, independent of the distance z." This doesn't quite make sense to me.
A sphere of charge: "has an electric field outside the sphere (r >= R) that is exactly the same as that of a point charge Q located at the center of the sphere." Does that mean we can just treat sphere charges as point charges?"
"Kind of off topic, can you recap how an electric field runs an electric motor? Can you use the concept of an electric field of a ring charge?"
"If an infinite plane charge has the same field strength at any point in space wouldn't an infinite line of charge do the same as long as you are in the same plane?"
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