How Do You Verify Electrostatic Force via Direct Integration?

  • Thread starter Thread starter Midas_Touch
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    Electrostatics
Midas_Touch
The problem says

Verify by direct integration that

F= qE = - q^2/(16*pi*epsilon_0*d^2) in the "x unit" direction

is the resultant of the Coloumb force between q and the induced charge described by

sigma_f(y,z) = -qd/(2*pi*(d^2+y^2+z^2)^3/2

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Okay, I am not sure what to integrate here. Do I integrate the surface charge density or the force?

Thank you,
Midas
 
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F = -dU and -(grad V) = E so maybe your suppose to verify electric potential by integrating qE along x. I'm not sure exactly what they are asking for either...
 
Please note that the OP is nearly 5 yrs old. I would assume this homework problem has long neen resolved.

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To solve this, I first used the units to work out that a= m* a/m, i.e. t=z/λ. This would allow you to determine the time duration within an interval section by section and then add this to the previous ones to obtain the age of the respective layer. However, this would require a constant thickness per year for each interval. However, since this is most likely not the case, my next consideration was that the age must be the integral of a 1/λ(z) function, which I cannot model.
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