- #1
eminem14
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Homework Statement
A finite uniform linear charge ρ_L = 4 nC/m lies on the xy plane; start point and end point are (7,0,0) and (0,7,0) .While
point charges of 8 nC each are located at (0, 1, 1) and (0, -1, 1). Find E at (0, 0 ,0)
Homework Equations
dE=ρ_L *dz'/4∏ε * (r-r'/[magnitude(r-r')]^3)
where r'=z' *a_z and r=ρ * a_ρ and z=0, 0<=∅<=2∏
dE_ρ=ρ_L*dz'/4∏ε *ρ/R^3 dE_z= - ρ_L*dz'/4∏ε * z/R^3
The Attempt at a Solution
I obtained the E-field contributions of the two point charges using the E-field formula for a point charge. However, the line charge is tricky because if it were infinite there would only be the ρ component contributing. I know the length of the rod matters and also the vector from the point of observation (0,0,0) to the midpoint of the rod. However, can't quite connect the dots. Need some help asap.
Thank you in advance