1. The problem statement, all variables and given/known data
A thin rod bent into the shape of an arc of a circle
of radius R carries a uniform charge per unit length lambda = 2.20?10-9 C/m. The arc subtends a total angle 2 theta0, symmetric about the x axis, as shown in the figure below. theta0 = 28.0? and R = 0.28 m
hard to avoid integrating for this one but at least the integral isn't too bad. Remember that the problem asks for the magnitude of the electric field.
2. Relevant equations
3. The attempt at a solution
I found the length of the rod and the charge of the rod using simple circle calculations:
then using C and the 56
ratio, i found the length of the rod. Then using the charge/length given, i found the charge. After i had all my info, i filled it into the equation but got the wrong answer. Any Suggestions?