question_answer

A point charge \[Q\] lies on the perpendicular bisector of an electrical dipole of dipole moment p. If the distance of \[Q\] from the dipole is r (much larger than the size of dipole), then the electric field at \[Q\] is proportional to :

A)  p and r-3                             

B)  p2 and r3

C)  p and r-2                             

D)  none of these