2.13.5 Electric Field of an Arc-36 2.13.6 Electric Field Off the Axis of a Finite Rod.......................................2.-37 2.14 Conceptual Questions. 2-39 2.15 Additional Problems .2-40 2.15.1 Three Point Charges........ .2-40 2.15.2 Three point Charges..2-40 2.15.3 Four Point Charges 2-41 2.15.4 Semicircular Wire. 2-41 2.15.5 Electric Dipole.......... 2-42 2.15.6 Charged Cylindrical Shell and Cylinder 2-42 2.15.7 Two Conducting Balls....................... 2-43 2.15.8 Torque on an Electric Dipole................. .2-43 2-22.13.5 Electric Field of an Arc.............................................................................2-36 2.13.6 Electric Field Off the Axis of a Finite Rod...............................................2-37 2.14 Conceptual Questions........................................................................................2-39 2.15 Additional Problems..........................................................................................2-40 2.15.1 Three Point Charges..................................................................................2-40 2.15.2 Three Point Charges..................................................................................2-40 2.15.3 Four Point Charges ...................................................................................2-41 2.15.4 Semicircular Wire .....................................................................................2-41 2.15.5 Electric Dipole ..........................................................................................2-42 2.15.6 Charged Cylindrical Shell and Cylinder...................................................2-42 2.15.7 Two Conducting Balls..............................................................................2-43 2.15.8 Torque on an Electric Dipole....................................................................2-43 2-2