Recent content by zweebna

Homework Statement Many sources of electromagnetic waves (stars and light bulbs, for example) radiate in all directions. A simple example of the electric field for a monochromatic electromagnetic wave produced by a spherical source is $$E(r,\theta,\phi,t)=A\frac{\sin \theta}{r} \big(\cos...

Homework Statement A long (infinite) wire (cylindrical conductor of radius R, whose axis coincides with the z axis carries a uniformly distributed current I in the +z direction. A cylindrical hole is drilled out of the conductor, parallel to the z axis, (see figure above for geometry). The...

Thank you!

Ah so since the line is along ##x=0## would I just ignore the y component? So they are ##\sqrt{x^2+(d+z)^2}## and ##\sqrt{x^2+(d-z)^2}##?

Ah you're right. So the first time is ##\sqrt{x^2+y^2+(d+z)^2}## and the second term is ##\sqrt{x^2+y^2+(d-z)^2}##? Thank you I think I have it.

So if the point where we're computing potential is ##0<z<d##, then in the first term it would be ##d-z## and in the second term it would be ##z+d##?PS What forum should this be in? Since posting it's been moved from intro to advanced, back to intro, and now it's back in advanced.

Homework Statement An infinite line of charge with charge density λ is parallel to and a distance d above an infinite grounded conducting plate. What is the charge density σ that is induced in the plate? For simplicity, consider the line of charge to lie along the line x = 0. Homework...

Homework Statement "An infnitely long hollow cylinder of radius ##a## has surface charge density ##σ_a##. It is surrounded by a coaxial hollow cylinder of radius ##b## with charge density ##σ_b##. The charge densities are such that the total confguration is electrically neutral. Using whatever...