All Questions
4
questions
3
votes
1
answer
110
views
Nabla commutation in electromagnetism
I don't know how to work with the 'reversed' dot product operator,
$$v\cdot \nabla$$
I arrived to expressions like this trough doing some calculus, and I don't know how to continue with the calculus ...
- 529
1
vote
2
answers
381
views
Electric field in the center of hemisphere shell without double/triple integrals
I'm trying to derive the electric field in the centre of a solid hemisphere of radius $ R $ where the charge is distributed uniformly. I have seen different methods involving double/triple integrals ...
- 493
0
votes
3
answers
141
views
Problem in finding the divergence at a point [duplicate]
I am solving a problem given as
Divergence of $\frac{\textbf{r}}{r^3}$ is
a) zero at the origin
b) zero everywhere
c) zero everywhere except the origin
d) nonzero everywhere
The answer is given as (...
- 436
2
votes
1
answer
1k
views
Curl of P in a symmetric problem
I was reading Introduction to Electrodynamics by Griffiths, and I'm stuck on 4.3.2. He says:
If the problem exhibits spherical, cylindrical or plane symmetry, then you can get $\textbf{D}$ ...
