How to Calculate Potential Energy Difference for a Dipole in an Electric Field?

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SUMMARY

The discussion focuses on calculating the potential energy difference for a water molecule's dipole moment of 6.1×10-30 C m in an electric field of 2.0×105 V m-1. The relevant equations include U=kq1q2/r, V=U/q, and V=Ex. The user suggests using a charge of 1.6×10-19 C to determine the diameter of the molecule and apply the formula for potential energy. The discussion emphasizes the importance of understanding dipole moments and their interactions with electric fields.

PREREQUISITES
  • Understanding of dipole moments and their significance in molecular physics.
  • Familiarity with electric fields and their properties.
  • Knowledge of potential energy calculations in electrostatics.
  • Proficiency in using fundamental physics equations such as U=kq1q2/r.
NEXT STEPS
  • Research the concept of torque on dipoles in electric fields.
  • Study the relationship between dipole moment and electric field strength.
  • Explore advanced calculations involving potential energy differences in various configurations of dipoles.
  • Learn about the implications of dipole interactions in molecular chemistry.
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Students and educators in physics, particularly those focusing on electrostatics and molecular interactions, as well as researchers interested in the behavior of dipoles in electric fields.

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Homework Statement


A molecule of water has a dipole moment of 6.1×10–30 C m. Calculate the difference in potential energy between when its dipole is parallel to an electric field of 2.0×105 V m–1 and when it is anti-parallel to the field.


Homework Equations


U=kq1q2/r
V=U/q
V=Ex


The Attempt at a Solution


If the charge on each side of the dipole is just 1.6x10-19 ill be able to do the problem i think. other than that i have no idea what to do.
i was guna divide the dipole moment by 1.6x10-19 to give me the diameter of the molecule. then just use U=kq1q2/r

Help me please and add any helpful infomation

Thankyou
 
Physics news on Phys.org
Investigate dipole moments in electric fields, and in particular the torque that obtains for a given angle of the dipole moment vector to the electric field vector.
 

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