Homework Statement
we put a dielectric hemishphere with radius (a) and dielectric coeeficient(k) on an infinite conducting plane.the system(hemsiphere and the plane) are in a constant electric field E0.
find the surface charge distrubution on the plane as a function of (r).
and explain what...
its simple!the final answer is going to come up simple.and the brute force way is HARD!
but we have the potential.we just need to plug in the according prameters!which is much simpler then doing the BRUTE FORCE integral which can't be done!
Let me clear it up.by integration we can simply get the potential of a rod with uniform charge density in space.putting its potential CONST and then doing some algebra we find out its equipotentials are ellipses whose centers are at the edge of the rod(in 2D.in 3D its just ellipses rotated about...
I want to find the potential of a conducting disk in space whithout laplace equation.(i know how to do that).I want to use the potential of a uniformly charged rod.because its equipotentials are ellipsoids(ellipses rotated around the rod).now a disk is a limiting case of an ellipsoid.
I can't...
we have a well known and simple equation for curl in cartesian coo. now we want it in let's say cylindrical coordinates.
question is...can we transform every thing to cylinderical and then use the formula for cartesian?I mean writing basis vectors of cartesian in terms of r and theta and z and...
and a nicee idea!
imagine we have an N gon on xy page.we want to find the E vector at some z(out the page over the center of polygon) but not actually OVER the center.say we move away from the axis z(which starts at O which is the center of polygon) a tiny length delta .it means in cylindrical...
thank you sir.
of course we know the vector we want to rotate.its say;A(Ax,Ay,Az) but it doesn't matter I think.for what ever vector, we use we want to know N and zeta which must be functions of only alpha beta gamma(the euler angles correspending to rotation).
I mean imagine we have the...
imagine we rotate a vector centered at the origin with euler angles alpha,beta,gamma.
now the question is, can we do this rotation by the means of defining a vector N(which its length is 1).and rotating the vector zeta radians counter clockwise around N?
I think it must be possible and I want...
i don't study physics in english so i am not familiar with some words but anyway just use the equations i mentioned in three dimension(x,y,z) and simply use F=ma thing on them, plus ,if you want to calculate the resistance first check your estimated speed with some table to see if the resistance...
cant you say you can consume heat and have not worked but if you have worked you have consumed heat?? HA?
heat is just there like a worker ; he can be there idle(NO work); or work and slowly die(Be consumed for work)?