What is the electric field at a point 4 cm from the axis of a cylindrical shell?

[pcml100]

Homework Statement

A cylindrical shell of radius 9.9 cm and length 286 cm has its charge density uniformly distributed on its surface. The electric field intensity at a point 23 cm radially outward from its axis (measured from the midpoint of the shell ) is 44800 N/C.
Given: ke = 8.99 × 10^9 N · m^2/C^2,

What is the electric field at a point 4 cm from
the axis?

Homework Equations

E = (K_eq)/r²

The Attempt at a Solution

I kind of don't even know where to start

 

[Mandeep Deka]

First get hold of some good book and clarify the theory part. Then think of attempting the problem.

 

[pcml100]

Thanks for your incredibly helpful and polite answer Einstein. I figured it out, it just confused me because I had done around 15 problems by the time I got to this one so I was exhausted. This forum has some really stuck up people if I may say so...

 

[Mandeep Deka]

you may say so...
I didnt mean to be 'impolite'. So i do apologize!

I kind of don't even know where to start
[/b]

But next time before posting a problem, try it out at least an hour, and give a decent attempt to the solution. The mentors will help you to figure out where you have done a mistake, or where you are stuck!

 

[SammyS]

Thanks for your incredibly helpful and polite answer Einstein. I figured it out, it just confused me because I had done around 15 problems by the time I got to this one so I was exhausted. This forum has some really stuck up people if I may say so...

However, Most people who post questions asking for help are actually polite. A few are not so polite.