KTUYSBeta
Log inSign up

Electrostatic Potential and Capacitance · Class 12 · CBSE · Science Physics

An electric dipole of dipole moment P is placed in a uniform electric field E with its axis making an angle of 60^{circ} with the field. The potentia…

Practice question from Electrostatic Potential and Capacitance (Class 12 · CBSE · Science Physics), with the correct answer and a step-by-step solution.

medium · MCQ · Q-8B62A6

An electric dipole of dipole moment PP is placed in a uniform electric field EE with its axis making an angle of 60∘60^{\circ} with the field. The potential energy of the dipole is:

  1. A.−32PE-\frac{\sqrt{3}}{2}PE
  2. B.−PE2-\frac{PE}{2}Correct answer
  3. C.PE2\frac{PE}{2}
  4. D.−PE-PE

Solution

The potential energy UU of an electric dipole in a uniform electric field is given by U=−P⋅E=−PEcos⁡θU = -P \cdot E = -PE \cos\theta. Here, θ=60∘\theta = 60^{\circ}. Thus, U=−PEcos⁡(60∘)=−PE(12)=−PE2U = -PE \cos(60^{\circ}) = -PE \left(\frac{1}{2}\right) = -\frac{PE}{2}.

More from Electrostatic Potential and Capacitance

All of Electrostatic Potential and Capacitance

Practise more Physics

Sign up free for adaptive practice on this chapter, with instant feedback and hints on every question.

Start practising free

Free to start · No credit card needed