Rick16's latest activity

This is very helpful, thanks a lot.

@Rick16 This (square of the) displacement can be used to obtain the kinetic energy ##T = mv^2/2## because ##T## contains the square of...

Thank you everybody for your help. It all begins to make sense now. Griffiths even puts the equation ##\nabla \cdot (\frac{\hat...

Griffiths went through the same derivation for ##\nabla \cdot \frac{\hat r}{r^2}## to show that there's a delta function at the origin...

Yes.

You should draw the conclusion that you need to be careful when using the expression for the divergence in spherical coordinates lest...

@Rick16 The general strategy would be to consider cases of ##r \neq 0## and ##r = 0## separately. The first case was already covered by...

@Rick16 Also, this term with a delta function can be obtained not from electric field but from the potential, since you have the Poisson...

@Rick16 The way you calculated divergence is correct when you assume that ##r \neq 0##, but this means that you have to exclude the...

This looks very convincing, but do you really go through all this everytime you are confronted with this kind of situation? Griffiths...

Should I draw the conclusion that whenever I have a vector field in spherical coordinates with ##r^2## in the denominator, I cannot...

I have looked back at section 1.5 in the book, but it has not helped much so far. Apparently there are situations when the general...

TL;DR: Griffiths, problem 2.46 Here is the problem statement: The electric potential of some configuration is given by the expression...

At my university, we could choose between 3 different tracks. Once a track was chosen, there was no more flexibility, no electives.

So, basically, the advice that I am getting is that I should wait and see, take one step at a time. That is certainly reasonable. On...