A2L Item 257

Goal: Hone the vector nature of the electric field

Source: CTQ283-7

charges are positioned as shown. What is the direction of the
electrical field at the origin?

  1. Along i or in the +x direction
  2. Along -j or in the -y direction
  3. Along j or in the +y direction
  4. Along -i or in the -x direction
  5. Along some other direction
  6. E=0 at the origin



(3) Difficulty with this question indicates that students do not know
how the direction of the electric field relates to the sign of the