GKFix MCQ Question

How is the work done by an external torque in rotating a dipole from angle θ₁ to θ₂ calculated?

• A. W = pE(sinθ₁ – sinθ₂)
• B. W = pE(cosθ₁ – cosθ₂)
• C. W = pE(tanθ₁ – tanθ₂)
• D. W = pE(θ₂ – θ₁)