Question:
The torque on an electric dipole consisting of charges $q$ and $-q$ of dipole moment $P$ in a uniform electric field $E$ is ________.
The torque on an electric dipole consisting of charges $q$ and $-q$ of dipole moment $P$ in a uniform electric field $E$ is ________.
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$\tau = P E \sin \theta$, where $\theta$ is the angle between $P$ and $E$.
Updated On: Jun 26, 2026
- $qE$
- $-qE$
- Zero
- $P \cdot E$
- $P \times E$
Show Solution
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The Correct Option is
Solution and Explanation
Step 1: Concept
Torque is a rotational force that acts on an object when it is placed in an external field.
Step 2: Meaning
An electric dipole consists of two equal and opposite charges separated by a distance.
Step 3: Analysis
When placed in a uniform electric field $E$, the forces on the two charges create a couple that results in torque.
Step 4: Conclusion
The mathematical expression for this torque is the cross product of the dipole moment $P$ and the electric field $E$. Final Answer: (E)
Torque is a rotational force that acts on an object when it is placed in an external field.
Step 2: Meaning
An electric dipole consists of two equal and opposite charges separated by a distance.
Step 3: Analysis
When placed in a uniform electric field $E$, the forces on the two charges create a couple that results in torque.
Step 4: Conclusion
The mathematical expression for this torque is the cross product of the dipole moment $P$ and the electric field $E$. Final Answer: (E)
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