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Homework Statement
An electric dipole consists of +/- Q = 330nC separated by a distance of 1200nm. The dipole is initially oriented in the -i direction (along the negative x axis). The dipole is in a uniform external electric field of E=2500j N/C Determine the following:
a) The magnitude of the torque on the dipole when it is at +165° to the +x axis
b) The work done by the electric field to rotate the dipole to an angle of +110° to the +x-axis from its initial position
Homework Equations
|T| = |P| |E| sin θ
W = Uf-Ui
The Attempt at a Solution
I get what to plug into solve the problems, but the only issue I have is that I'm not sure what θ should be in these equations because I can't really visualize between what two vectors the angle is supposed to be between? When it says it's initially oriented in the -i direction, does that mean it has already rotated 180°? I'm confused.