A nonconducting spherical shell of inner radius a = 2.00 cm and outer radius b = 2.40 cm has (within

A nonconducting spherical shell of inner radius a = 2.00 cm and outer radius b = 2.40 cm has (within its thickness) a positive volume charge density ρ = A/r, where A is a constant and r is the distance from the center of the shell. In addition, a small ball of charge q = 45.0 fC is located at that center. What value should A have if the electric field in the shell (a ≤ r ≤ b) is to be uniform?

[andrewmaksimovich]

Rare to find such a quality explanation on a hard topic in physics. This is a huge help

[chrisburgess]

These are really wonderful videos, and you do an excellent job explaining a tricky subject. It's very helpful to see these problems explained from start to finish.

[邱威棠-lz]

your teaching is better than my professor .

[cezarcristiangheorghe]

This is a huge help, thank you so much for taking the time to explain each and every step, every notation, even the algebra, this is some of the best teaching I have seen, thank you for making what would normally be a frustrating experience, an interesting one instead 😁

[keviny]

V=4 pi r^2 for sphere
how could
dV = 4 pi r^2 dr ?
finding derivative with respect to x for V, dV should be 8 pi r dr ?

and why is the integrations limits not a to b, why need to introduce rg?

[zacharytaylor]

Thanks a bunch these are slowly helping me learn this topic :)

[omaicatobi]

DUDE I have question that I cant solve it

The electric force btween an Electron and Proton separated by 3nm is :

could u please solve this problem

[kaitlynnbrooks]

Your calculations do not match up with the calculations from my calculator.