If a dipole made up of charges in an electric field E has its dipole moment p aligned parallel to the direction of E, what is the magnitude of the torque on the dipole due to the electric field? (|p| = qd, where d is the distance between the ends of the dipole and q is the magnitude of the charge on each end of the dipole)
A. τ = qdE/2
B. τ = qdE/4
C. τ = qdE
D. τ = 0
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