Part C Ch21 Electric Dipole Torque on a Dipole in a Uniform Field Part B Constan

Question

Part C

Ch21 Electric Dipole Torque on a Dipole in a Uniform Field Part B Constants (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 E (independent of the field produced by the dipole) pointing in the positive y direction. The What is Tcm(0), the magnitude of the torque that the electric field exerts about the center of mass of the dipole? Express the magnitude of the total torque in terms of the given quantities. View Available Hint(s) Tom(0)= qEdsin(0) Figure

Explanation / Answer

C)From the defination of potential energy

U = F d

U(theta) = q E d sin(theta) d(theta)

On integrating,

U = - q E d cos(theta)

Hence, U(theta) = -E q d cos(theta)

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