(Figure 1) Consider an electric dipole whose dipole moment (a vector pointing fr

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(Figure 1) Consider an electric dipole whose dipole moment (a vector pointing from the negitive charge to the positive charge) is oriented at angle with respect to the y axis. There is an external electric field of magnitude (independent of the field produced by the dipole) pointing in the positive y direction. The positive and negative ends of the dipole have charges and , respectively, and the two charges are a distance apart. The dipole has a moment of inertia about its center of mass. It will help you to imagine that the dipole is free to rotate about a pivot through its center.

Explanation / Answer

Fnet = net force on dipole
= qE j + -qE j
= 0

() = torque experienced by electric filed on dipole about center

= qEd/2sin + qEd/2sin

() = qEdsin

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(Figure 1) Consider an electric dipole whose dipole moment (a vector pointing fr

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