1. The problem statement, all variables and given/known data A straight wire 7.0m long carries 30uC distributed uniformly over its length. What is the line charge density on the wire? _____ uC/m 2. Relevant equations A) E = 2k/lamda / B) E = kq/r some other ones? 3. The attempt at a solution I sub B into a, and got q/2 = 15. But its not correct. Which formula do I use?