Two rings of radius 4 cm are 12 cm apart and concentric with a common horizontal x axis. The ring on the left carries a
uniformly distributed charge of +40 nC, and the ring on the right carries a uniformly distributed charge of −40 nC.
(a) What is the electric field due to the right ring at a location midway between the two rings?
(b) What is the electric field due to the left ring at a location midway between the two rings?
(c) What is the net electric field at a location midway between the two rings?
(d) If a charge of −2 nC were placed midway between the rings, what would be the force exerted on this charge by the
rings?
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