184_notes:pc_efield

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184_notes:pc_efield [2021/01/26 18:27] – [Electric Field Vectors] bartonmo184_notes:pc_efield [2021/05/16 23:43] schram45
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 $$\vec{E_A} = \frac{1}{4 \pi\epsilon_0}\frac{Q}{d^2} \hat{y}$$ $$\vec{E_A} = \frac{1}{4 \pi\epsilon_0}\frac{Q}{d^2} \hat{y}$$
  
-[{{  184_notes:efieldvectors.png?200|Electric Field from a point charge}}]+[{{ :184_notes:efieldvectors_new.png?250|Electric Field from a point charge}}]
 So we draw the electric field vector at Point A pointing straight up. If you follow the same steps for Points B-D, you find an important pattern from drawing this electric field vectors: **the electric field from a positive point charge points away from the charge**. If we were to look at points that were a distance of 2d away from the point charge, we would need to change the magnitude of the electric field by a factor of 4 (since it is $r^2$ in the denominator), but the directions would stay the same. So we draw the electric field vector at Point A pointing straight up. If you follow the same steps for Points B-D, you find an important pattern from drawing this electric field vectors: **the electric field from a positive point charge points away from the charge**. If we were to look at points that were a distance of 2d away from the point charge, we would need to change the magnitude of the electric field by a factor of 4 (since it is $r^2$ in the denominator), but the directions would stay the same.
  
 ==== Examples ==== ==== Examples ====
 +{{youtube>cISnXtOdXeQ?large}}
 [[184_notes:examples:Week2_electric_field_negative_point|Electric Field from a Negative Point Charge]] [[184_notes:examples:Week2_electric_field_negative_point|Electric Field from a Negative Point Charge]]
  • 184_notes/pc_efield.txt
  • Last modified: 2021/05/26 13:39
  • by schram45