Understanding Maxwell's Equations and the Role of Charge and Current Conditions

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    Maxwell's equations
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The discussion centers on the conditions necessary for the Maxwell Equations, particularly focusing on the continuity equation and the concept of displacement current. Participants emphasize the importance of understanding the relationship between charges, currents, and the displacement current, especially in the context of a capacitor connected to an EMF. The need for an additional term in the equations, which accounts for changes in electric displacement over time, is highlighted as crucial for consistency in electromagnetic theory. There is a suggestion for individuals to engage more deeply with the material and explore solutions independently, as this can enhance understanding. The conversation reflects a mix of frustration with instructional clarity and a desire for deeper comprehension of electromagnetic phenomena.
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hey i need help explaining this... I am really lost...

What is the further condition on the charges and the currents, which is necessary for the Maxwell Equations? Explain how it relates to the existence of the displacement current.
 
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rho11yw00d said:
hey i need help explaining this... I am really lost...

What is the further condition on the charges and the currents, which is necessary for the Maxwell Equations? Explain how it relates to the existence of the displacement current.

You are really not giving us a lot to go by. It would help if you put in some CONTEXT of your question.

With just that, I'd say it's the continuity equation.

Zz.
 
rho11yw00d said:
hey i need help explaining this... I am really lost...

What is the further condition on the charges and the currents, which is necessary for the Maxwell Equations? Explain how it relates to the existence of the displacement current.

Well do you know what a displacement current is ?
For example, explain this for a capacitor that is connected to an EMF, so that there is a current flowing. Do you know the boundary conditions associated with EM-phenomena ?

In stead of asking questions that YOU should answer, do try to think and solve it for yourself...it is much more rewarding :wink:

marlon
 
yeah this teacher isn't giving me much to work ith here... but I am going to look into what marlon said... thanks! i know i should but i think I am looking too much into the question maybe
 
The curl H Maxwell equation is inconsistent if there is only a j term on the RHS.
This is because divcurl=0, but div j=-d rho/dt. Max realized that an additional term depending on dD/dt had to be added to the RHS. He called this term
"the dispacement current" because Max thought it was due to a displacement of bound charge in the aether. Now we know it is just there in the vacuum.
 
marlon said:
Well do you know what a displacement current is ?
For example, explain this for a capacitor that is connected to an EMF, so that there is a current flowing. Do you know the boundary conditions associated with EM-phenomena ?

In stead of asking questions that YOU should answer, do try to think and solve it for yourself...it is much more rewarding :wink:

marlon


:devil: strange, Marlon wrote once upon a time page after page of useful explanations. :confused:
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

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