Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Electrostatics/
Question 31416
JEE Physics · Hard

Electrostatics: Electric Dipole MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Electric DipoleHardQuestion 31416

Question

Work done in rotating a dipole from θ₁ to θ₂ in a uniform electric field:
  1. A
    pE(cosθ₁ − cosθ₂)
    Correct
  2. B
    pE(cosθ₂ − cosθ₁)
  3. C
    pE sinθ
  4. D
    pE(θ₂ − θ₁)

Correct answer

pE(cosθ₁ − cosθ₂)

Explanation

U = −pE cosθ. Work done = ΔU = U₂ − U₁ = −pE cosθ₂ + pE cosθ₁ = pE(cosθ₁ − cosθ₂).

Review Electrostatics notesStart timed chapter practice