Regarding home exercise 3, question 4.
Although the direction of the Electric Field is obvious, I can't understand why it is proportional to 1 over L cubed instead of 1 over L squared. Can you clarify the reason for this?
Please provide more details about the question. The order of the questions might be different.
Normally 1/L^3 dependence is obtained for dipoles. Please see last lecture for derivation.
Normally 1/L^3 dependence is obtained for dipoles. Please see last lecture for derivation.