The figure shows the equipotentials for each integer voltage between and including -4 V and +4 V for an arrangement of charges as shown. Assume that -4 V is the minimum potential and +4 V is the maximum for any point within the diagram. The table gives distances to neighboring equipotential for points on a line.
| point |
lower (cm) |
higher(cm) |
| b |
0.3 |
0.3 |
| c |
0.6 |
2.1 |
| d |
0.6 |
1.5 |
| e |
0.3 |
0.3 |
| f |
0.3 |
0.4 |
| g |
0.65 |
1.7 |
| j |
0.5 |
0.6 |
| k |
1.5 |
0.6 |
| l |
0.6 |
1.5 |
To one decimal place, what is the average electric field magnitude in V/cm at point b?
