Question

Which of the following is true about the electric field from infinitely long, charged wire: a) The vectors of the net electric field are perpendicular to the wire. b) The net electric field is constant at any distance from the wire. c) The vectors if the net electric field are parallel to the wire. d) The net electric field is the largest at the center of the wire.

Answer 1

Let us go to the basics first True or false Question For the electric field from infinitely charged wire: (a) The vectors of the net electric field are perpendicular to the wire = > True Direction of deictic field E_i vector due to charge element Delta q_i indicated in the figure is represented by vector: Answer option (D) D vector \r\n Correct expression for x - component of electric field due to charge Delta q is: Delta E vector = Ke Delta q/x^2 + y^2 Delta E_x = Ke Delta q/x^2 + y^2 sin theta Option (C)