# Search results

1. ### Ampere's law wire problem

thank you very much Doc al it is as what you mentioned related to the current density for c and d the current is the same whereas in b smaller and a is even smaller than b Sometimes we think in very difficult method when we can solve it in easier way Thank you again and regards
2. ### Ampere's law wire problem

Hellow every one I have small Q but I stuck on it there is pic attached hope to be intersting and clear to you Homework Statement rank the loops accoroding to the current enclosed greatest first Homework Equations we have three eqn's B = u "node" I encِْْْْ B = u"node" i / 2 pi r...
3. ### What is the phase difference ?

thank you very much I have solved the problem
4. ### Stable equilibrium problem

I think you can assume that one of the charges to be negative and the other is negative and it will give you the right answer.. and welcome to PF.
5. ### What is the phase difference ?

Homework Statement When a wave travels through a medium, individual particles execute a periodic motion given by the equation : y = 4.0 sin[ pi/4(2 t + x/8)] where y and x in meters and t in seconds the phase difference at any given instant are 20.0 m apart is