Divergence Theorem-Electromagnetism

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SUMMARY

The discussion centers on the application of the divergence theorem in electromagnetism, specifically in relation to the continuity equation. The user attempts to integrate the continuity equation into the divergence theorem, arriving at the expression ∫S J.ds = -d/dt∫V ρdV. A fellow participant confirms that the user has achieved the correct formulation and emphasizes that no further calculations are needed, only interpretation of the equation's components.

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Homework Statement


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Homework Equations


The divergence theorem is quoted on the problem sheet.


The Attempt at a Solution


I am struggling with the last question (2)c)). I have tried to put the continuity equation into the divergence theorem and have got:

S J.ds=-d/dt∫V ρdV

But I'm not sure if I can just sub it in in this way. Do I then need to set up an intergral to get the final solution? I am not really sure what form the answer will be in.

Thanks.
 
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sclatters said:
I am struggling with the last question (2)c)). I have tried to put the continuity equation into the divergence theorem and have got:

S J.ds=-d/dt∫V ρdV

But I'm not sure if I can just sub it in in this way. Do I then need to set up an intergral to get the final solution? I am not really sure what form the answer will be in.

Hello, sclatters. I'm not sure what you mean when you say "I'm not sure if I can just sub it in in this way."

But, it looks to me that you have the result! No further calculation should be necessary. You just need to interpret the meaning of the left and right sides of the equation.
 
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