Question: Two 10-cm-diameter charged rings face each other, 20 cm apart. The left ring is charged to -20 nC and the right ring is charged to

Two 10-cm-diameter charged rings face each other, 20 cm apart. The left ring is charged to -20 nC and the right ring is charged to +20 nC.
a. What is the electric field E, both magnitude and direction, at the midpoint between the two rings?
b. What is the force on a proton at the midpoint?

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