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PUCET (Punjab) Dipole in External Field — practice questions

Explore 1 free Dipole in External Field questions in PUCET (Punjab) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Dipole in External Field questions and exercises with answers

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An electric dipole of moment $\vec p$ is placed in a uniform external field $\vec E$. The torque on it is:Read the answer and worked solution →

Worked practice questions

An electric dipole of moment $\vec p$ is placed in a uniform external field $\vec E$. The torque on it is:

  1. $pE\cos\theta$
  2. $pE / \sin\theta$
  3. $\vec p \times \vec E$
  4. $\vec p \cdot \vec E$
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Correct answer: C. $\vec p \times \vec E$

Torque on a dipole in a uniform field is $\vec\tau = \vec p \times \vec E$, magnitude $pE\sin\theta$, which tends to align $\vec p$ with $\vec E$.

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