Consider a half-infinite line of charge with charge per unit length l. This line begins at the

Question:

Consider a half-infinite line of charge with charge per unit length l. This line begins at the origin and then goes to infinity to the left (Fig. P17.81). Find the component of the electric field in the direction shown (the y direction, perpendicular to the line) at a distance r from the end of the line.

Figure P17.81