posted by Thomas .
1. A charge (uniform linear density=9.0 nC/m) is distributed along the x-axis from x=0 to x=3.0m. Determine the magnitude of the electric field at a point on the x axis with x=4.0m.
2. A +2nC point charge is placed at one corner of a square (1.5m on a side), and a -3.0nC charge is placed on a corner diagonally away from the first charge. What is the magnitude of the electric field at either of the two unoccupied corners?
2. What is Pythagoras theorem? figure the E from each, then use the theorem.
1. Simple integration. draw the figure.
E=int k (9.0E-9)/(4-x)^2 dx
integrate from x=0 to 3