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Differentiating electromagnetic field

  • Thread starter jlmac2001
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  • #1
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For question 3, i don't know ho to differentiate the electromagnetic field. Can someone help me?
 

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  • #2
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correction

It's question 2
 
  • #3
HallsofIvy
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If F(x,y,z,t) the "total derivative of F is:
[tex]\frac{\partial F}{\partial x}dx+\frac{\partial F}{\partial y}dy+\frac{\partial F}{\partial z}dz+\frac{\partial F}{\partial t}dt[/tex]
 
  • #4
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help with #2 not #3

I put the wrong question number down. It's #2 that I need help with. Can someone help?
 
  • #5
HallsofIvy
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Odd. Your second post telling us that it is "problem 2 not problem 3" appears after my post but with an earlier "time stamp".

In any case, I have already given the general formula for "total differential". You might also want to know that, for a vector valued function E, [tex]\frac{\partial(E.E)}{\partial x}= 2E.\frac{\partial E}{\partial x}[/tex]. That should be all you need.
 
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