Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

Derive the expression for net force and torque experienced by electric dipole placed in uniform external electric field such that angle b/w p and E is

theta. Discuss the cases of stable and unstable equilibrium with diagram.


Let the length of the dipole is s such that |r+| = s/2  |r-| = s/2
the forces on +q and -q is F+ = qE , F- = -qE
total force on the dipole is zero
torque = r+×F+  +  r-×F-
           = s/2×qE  +  -s/2×-qE
           = p×E
1 4 1
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts