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11. Let two rings both with radius a, be parallel to one another along the y-axis. Each ring carries a uniform charge q. What is the electric field at point along the y-axis if the rings are a distance from the origin? 12. Say we have a dipole consisting of charges -e and te separated by 0.34 nm. What is the work required to rotate the dipole from an initial parallel orientation to the electric field (E 1.1 x 103N/C) to an antiparallel orientation?

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