Part A Two 10-cm-diameter charged rings face each other, 20 cm apart. The left ring is charged to - 20 no and the right ring is charged to +20 nC. What is the magnitude of the electric field E at the midpoint between the two rings? You may want to review (Pages 641 - 643) . Express your answer wth the appropriate units. HA E: Value Units Submit Request Answer Part B What is the direction of the electric field E at the midpoint between the two rings? O to the center of the right ring O to the center of the left ring Submit Request Answer Part C What is the magnitude of the force on a proton at the midpoint? Express your answer with the appropriate units. HA ? F Value Units Submit Request AnswerPart D What is the direction of the force F on a proton at the midpoint? O to the right ring O to the left ring Submit Request