- #1

- 97

- 0

## Homework Statement

A cylindrical shell of radius 7.00 cm and length 240 cm has it's charge uniformly distributed on it's curved surface. The magnitude of the electric field at a point 19.0cm radially outward from its axis (measured from the midpoint of the shell) is 36.0 kN/C. Find (a) the net charge on the shell and (b) the electric field at a point 4.00 cm from the axis, measured radially outward from the midpoint of the shell.

## Homework Equations

[tex]\Phi[/tex]_E= [tex]\int[/tex]E dA = qin/E_0

## The Attempt at a Solution

[tex]\Phi[/tex]_E= E dA = qin/E_0

= E[tex]\int[/tex] dA = EA= [tex]\lambda[/tex]l/E_0

E(2[tex]\Pi[/tex]rl)= [tex]\lambda[/tex]l/E_0

E= [tex]\lambda[/tex]/2[tex]\Pi[/tex]E_0r= 2k_e([tex]\lambda[/tex]/r)

I'm not sure what else to do or if any of that is right.