Three charges are at seperate corners of a square of edge length of 5cm. The two charges at opposite corners are positive with magnitude +10nc, and the other charge is negative with magnitude of -50nC.
A.) Find the electric field at the remaining (upper right corner).(Assume the +x axis is directed to the right and the +y axis is directed upward.)
B.) Find the force on a -50 nC particle at the remaining remaining (upper right) corner.
C.) With all four charges in play, is there a point where the electric field is zero.