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184_notes:examples:week4_charge_cylinder [2021/06/29 18:07] – schram45 | 184_notes:examples:week4_charge_cylinder [2021/06/29 18:09] – schram45 | ||
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Since $z$ is very large we will once again eliminate any constant terms tied in with it.$$\vec{E} = \frac{1}{4\pi\epsilon_0}\frac{Q}{z^2}\hat{x}$$ | Since $z$ is very large we will once again eliminate any constant terms tied in with it.$$\vec{E} = \frac{1}{4\pi\epsilon_0}\frac{Q}{z^2}\hat{x}$$ | ||
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+ | As we can see this is exactly the equation we get for a point charge! This should be expected. When viewing objects from sufficiently far away they will appear as point charges, kinda like looking at a person from a distance. | ||