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What part of this is the answer?
I don't understand what the answer is
start with the field of an infinite line of charge, what is that?
E= 1/(4pi€.) * ( 2(lambda))/r. Then what do I do?
differentiate and multiply by p :)
How would I differentiate? By dx?
did you look over the "force on a dipole" section?
Is the derivation clear?
Yes. I think. Lol
Do I differentiate or integrate?
differentiate that upside down triangle is the gradient (space derivative)
here everything only depends on r, no x's y's or z's needed to characterize the problem...
so the gradient is just the derivative with respect to r
Differintiating will get rid of r
nope. r is the variable.
what's the derivative of 1/r with respect to r?
Okay I got it. Is the final answer suppose to be negative?
all the rest of the terms are constants, they stay unchanged... multiply by the dipole moment (p) and you're done...
yes negative r hat is towards the center so it's an attractive force...
Oh now it makes sense thank you so much!! I may pass my quiz tomorrow now!
Hope it helped:) gl on the quiz!