| Always draw a vector field diagram. Draw the electric field vectors extending from the point at which you're finding the net electric field. Give the vectors approximately correct relative lengths. |
| For labeling electric fields, use the double subscript notation, Eab, where the a subscript represents the point where the field is to be found and the b subscript represents the charge producing the field. |
| Always show your +x- and y-axes. |
| When doing a net electric field problem, your vector field diagram may only show fields. Don't show forces on a vector field diagram. |
| Write a net electric field equation for each axis. Write the electric fields as magnitudes and introduce signs to indicate directions. |
| When substituting the expression for the E-field of a point charge, substitute the absolute value of the charge. |
