Thank you very much! I have just done it! Like your suggest, i use cartesian coordinate vector instead of spherical coordinate vector. This is the final equation i evaluate...
That's what i mean in last sentences. I don't include the vector in the equation. When iwant to use it, i don't understand how to. Is the magnitude of \vec{a}\theta is \theta1 and there is no magnitude in \vec{a}\phi? In other words, the miss vector numerator in equation (2) above is
(R1 -...
Now, i am trying to prove that electric field inside spherical shell whose constant surface charge density \rho is zero. Usually, it is proved by using Gauss law (there is no charge enclosed inside gaussian surface so there is no electric field inside the sphere). But, whe i am trying to solve...