Question

A 10-cm-long thin glass rod uniformly charged to 15.0 nC and a 10-cm-long thin plastic rod uniformly charged to - 15.0 nC are placed side by side, 3.80 cm apart. What are the electric field strengths E1 to E3 at distances 1.0 cm, 2.0 cm, and 3.0 cm from the glass rod along the line connecting the midpoints of the two rods? Specify the electric field strength E1 Specify the electric field strength E2 Specify the electric field strength E3

Answer 1

An. To get the field strength at the distances due to the rods, we use the expression of the field at a point on the bisector of a rod. Since the field at each point on the line joining their midpoints due to each rod is to the right, so to get the total field strength we add the field due to each rod.