3. Consider an electric dipole in an external uniform electric field as shown below: 0 +q Recall that is the angle between p and Ē. a) For what angles is the torque on the dipole zero? These are the equilibrium orientations. For each one (there are two), how does the direction of p compare to the direction of Ē? b) What is the potential energy in each equilibrium position? c) One of the equilibrium positions can be classified as stable and the other as unstable. Which one is which and what do you think is meant by stable/unstable?
3. Consider an electric dipole in an external uniform electric field as shown below: 0 +q Recall that is the angle between p and Ē. a) For what angles is the torque on the dipole zero? These are the equilibrium orientations. For each one (there are two), how does the direction of p compare to the direction of Ē? b) What is the potential energy in each equilibrium position? c) One of the equilibrium positions can be classified as stable and the other as unstable. Which one is which and what do you think is meant by stable/unstable?
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Transcribed Image Text:3. Consider an electric dipole in an external uniform electric field as shown below:
d
0
+q
15
E
Recall that is the angle between p and Ē.
a) For what angles is the torque on the dipole zero? These are the equilibrium orientations. For each one (there are two),
how does the direction of p' compare to the direction of Ē?
b) What is the potential energy in each equilibrium position?
c) One of the equilibrium positions can be classified as stable and the other as unstable. Which one is which and what do
you think is meant by stable/unstable?
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