- #1
sprinks13
- 3
- 0
hi, here's the question:
a rod in the xy plane has it's ends at (0,0) and (L,0). It has a uniform charge per unit length (lambda). Find the electric field on the x-axis for 0 < x < L.
solution attempt:
dEx = dE
= kdQ/r^2
dQ = lambda*ds = (Q/L)*dx
now i took my r = (L - a - x) where x is the location of dx and a is the distance from L to the point that the field is being measured (note that 0 < a < L).
dEx = KQ/L (integral) dx/(L - a -x)^2
So my problem is my r. It's wrong, but I am not sure why or how to fix it.
thanks in advance!
a rod in the xy plane has it's ends at (0,0) and (L,0). It has a uniform charge per unit length (lambda). Find the electric field on the x-axis for 0 < x < L.
solution attempt:
dEx = dE
= kdQ/r^2
dQ = lambda*ds = (Q/L)*dx
now i took my r = (L - a - x) where x is the location of dx and a is the distance from L to the point that the field is being measured (note that 0 < a < L).
dEx = KQ/L (integral) dx/(L - a -x)^2
So my problem is my r. It's wrong, but I am not sure why or how to fix it.
thanks in advance!