40. Points R and T are each a distance d from each of two particles with equal positive charges as shown. If ke =
, the work required to move a particle with charge q from R to T is:

(A)0
(B) keQq/d2
(C)keQq/d
(D)
(E) keQq/(2d).
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統計: A(14), B(0), C(0), D(0), E(0) #3093881
統計: A(14), B(0), C(0), D(0), E(0) #3093881