What is the potential energy of the 2 cases?

Asked by Rajeev | 22nd May, 2015, 10:13: AM

Expert Answer:

The potential energy of the dipole is given as
 
begin mathsize 14px style straight U equals negative straight p times straight E equals negative pEcosθ here comma space straight p space is space the space dipole space moment space and space straight E space is space the space electric space field.  Now comma space in space first space case colon straight theta less than 90 Hence comma space straight U equals negative pEcosθ  In space the space second space case comma space straight theta greater than 90 less than 180 therefore cosθ less than 1 Hence comma space straight U equals pEcosθ end style

Answered by Romal Bhansali | 22nd May, 2015, 12:15: PM