Two 10-cm-diameter charged disks face each other, 30 cm apart. The left disk is charged to - 50nC and the right disk is charged to + 50 nC . A) What is the electric field E⃗ , both magnitude and direction, at the midpoint between the two disks?
Express your answer to two significant figures and include the appropriate units.
B) What is the force F⃗ on a -1.4 nC charge placed at the midpoint?
Express your answer to two significant figures and include the appropriate units.