A continuous line of charge lies along the x axis, extending from [tex]-x_{0}{[/tex] to [tex]-\infty[/tex]. The line carries a uniform linear charge density [tex]\lambda_{0}[/tex]. What is E, the magnitude of the electric field, at the origin?(adsbygoogle = window.adsbygoogle || []).push({});

Use the symbols [tex]\lambda_{0}, x_{0}[/tex] and k (for the Coulomb constant) to enter your answer.

Ok so I'm 99% sure I've got the correct answer, but for some reason the *#!$ website we have to use to enter the answers is not accepting it. So before I blow a gasket over it I wanted to make sure the answer is correct.

Since we're looking for themagnitudeof the field it's easier for me to flip it over to the +x axis.

Basically it comes down to integrating E =

[tex]\int_x_{0}^\infty \frac{k\lambda_{0}}{(x=x_{0})^2[/tex], which, if I've done it correctly, comes to [tex] \frac{k\lambda_{0}}{2x_{0}} [/tex].

Ah I can't get the latex right. integral from x_not to infinity of (k lambda_not) / (x_not + x)^2 dx.

Is that correct?

----

On a side note - I'm new to the site and am still learning how to use latex. why is it that when you click "preview post" you can't see the result of the latex code? Unless I'm missing something, I have to actually post before I can see if I've made a mistake. Is that right?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Field resulting from line charge

**Physics Forums | Science Articles, Homework Help, Discussion**