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Del Cross question.

  • Thread starter miew
  • Start date
  • #1
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Homework Statement


I have to do an E&M problem, I think I got it, but I made a few steps that I don't really understand. The first one is:

If delxB= muJ
Does
del x dB/dt = mu dJ/dt ??
If so, why ?

I tried using latex, but it didn't work...sorry :(


Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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hi miew! :smile:

(have a del: ∇ and a curly d: ∂ and a mu: µ :wink:)

yes, because derivatives wrt independent variables always commute (ie you can always change the order) …

2/∂x∂t = ∂2/∂t∂x :wink:
 
  • #3
27
0
Thanks ! that makes sense :)
 

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