Verifying Electric Field of Charged Rod

[hoseA]

http://img209.imageshack.us/img209/2646/chargedrod1ew.png

I used the equation:

kq/(d(d+L))

I converted everything to meters before doing the calculations. (I'm kind of pressed for time at the moment... i'll post the actual work in 2 hours.)

I want to make sure the equation is right.

 

[Gokul43201]

1. An equation must contain an equality. What you've written is an expression. What is it an expression for ? And what do the variables represent ?

2. Have you learned integration ? If you have, I suspect you are required to derive the equation (it's just a 4-line derivation) for the field and substitute the values.

3. Assuming d is the distance to the center of the rod, that is not the equation I get for the field.

 

[hoseA]

1. An equation must contain an equality. What you've written is an expression. What is it an expression for ? And what do the variables represent ?

2. Have you learned integration ? If you have, I suspect you are required to derive the equation (it's just a 4-line derivation) for the field and substitute the values.

3. Assuming d is the distance to the center of the rod, that is not the equation I get for the field.

any more hints? i have to submit my homework in 20 min.

 

[hoseA]

Nevermind. i got it. Thanks for the help Gokul.