11. Continued from the last question, if initially the dipole is at rest and perpendicular to the external electric field, what is its angular speed (in terms of rotation instead of oscillation) when it becomes parallel to E?
(A) 2md/(qE)
(B) qE/(2md)
(C) 2qE/(md)
(D) md/(2qE)
(E) none of the above.

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