Electrostatic equilibrium problem

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SUMMARY

The discussion centers on the electrostatic equilibrium problem involving a charged sphere. The electric field just outside the sphere is calculated using the formula E = (40 × 10-9 ke) / (0.152), where ke is the electrostatic constant. A key conclusion is that the calculated electric field value does not match the graphical representation, indicating a misunderstanding of the situation's feasibility. This discrepancy highlights the importance of accurately interpreting electric field representations in electrostatics.

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  • Familiarity with electric field calculations
  • Knowledge of point charge equivalence for spherical charge distributions
  • Ability to interpret graphical data related to electric fields
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Homework Statement
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Relevant Equations
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For this problem,
1675051831178.png

I don't understand why this is impossible. Can someone please help?

Many thanks!
 
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What would be the magnitude of the electric field just outside the sphere?
 
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kuruman said:
What would be the magnitude of the electric field just outside the sphere?
Thank you for your reply @kuruman ! The electric field of a sphere is equivalent to that of a point charge so ## E = \frac {40 \times 10^{-9}k_e}{0.15^2} ##

Many thanks!
 
So why is the situation impossible?
 
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kuruman said:
So why is the situation impossible?
Thanks for your reply @kuruman ! Thinking... Its got to me something to do with the electric field.
 
Callumnc1 said:
Thanks for your reply @kuruman ! Thinking... Its got to me something to do with the electric field.
Yes. Look at the plot and then look at your post #3.
 
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kuruman said:
Yes. Look at the plot and then look at your post #3.
Oh thanks @kuruman ! The calculated value for the electric field at the surface of the charge is not equal to that value on the graph.
 

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