(C) In a uniform electric field,the force on the positive charge is $F_+ = qE$ and the force on the negative charge is $F_- = -qE$. The net force on t

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(C) In a uniform electric field,the force on the positive charge is $F_+ = qE$ and the force on the negative charge is $F_- = -qE$. The net force on the dipole is $F_{net} = F_+ + F_- = qE - qE = 0$. However,since these two forces act at different points,they form a couple that exerts a torque on the dipole given by $\tau = pE \sin \theta$. Therefore,the dipole experiences only a torque and no net force.

Class 12 Physics Electric Charges and Fields Electric Dipole and Electric Field

Easy

An electric dipole in a uniform electric field experiences (when it is placed at an angle $\theta$ with the field):

A
Force and torque both
B
Force but no torque
C
Torque but no force
D
No force and no torque

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Class 12 Questions

Class 12

Physics Questions

Chapter

Electric Charges and Fields

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Electric Dipole and Electric Field

In the situation shown in the diagram,if $q \ll |Q|$ and $r \gg a$,find the net force on the free charge $-q$ and the net torque on it about $O$ at the instant shown. ($p = 2aQ$ is the dipole moment).

MediumKCET 2023

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If the electric field intensity at a distance $x$ on the axis of a dipole is equal to the electric field intensity at a distance $y$ on its equatorial line,then the ratio $x:y$ is:

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What is the angle between the electric dipole moment and the electric field strength due to it on the equatorial line (in $^o$)?

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What does an electric dipole experience when placed in a uniform electric field?

Medium

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Match Column-$I$ with Column-$II$ related to an electric dipole of dipole moment $\vec{p}$ that is placed in a uniform electric field $\overrightarrow{E}$.
Column-$I$ (Angle between $\vec{p}$ and $\vec{E}$) Column-$II$ (Potential energy of the dipole)
$a. 180^{\circ}$ $i. -pE$
$b. 120^{\circ}$ $ii. pE$
$c. 90^{\circ}$ $iii. \frac{1}{2} pE$
$iv. 0$

MediumKCET 2025

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Column-$I$ (Angle between $\vec{p}$ and $\vec{E}$)	Column-$II$ (Potential energy of the dipole)
$a. 180^{\circ}$	$i. -pE$
$b. 120^{\circ}$	$ii. pE$
$c. 90^{\circ}$	$iii. \frac{1}{2} pE$
	$iv. 0$

An electric dipole in a uniform electric field experiences (when it is placed at an angle $\theta$ with the field):

Similar Questions

In the situation shown in the diagram,if $q \ll |Q|$ and $r \gg a$,find the net force on the free charge $-q$ and the net torque on it about $O$ at the instant shown. ($p = 2aQ$ is the dipole moment).

If the electric field intensity at a distance $x$ on the axis of a dipole is equal to the electric field intensity at a distance $y$ on its equatorial line,then the ratio $x:y$ is:

What is the angle between the electric dipole moment and the electric field strength due to it on the equatorial line (in $^o$)?

What does an electric dipole experience when placed in a uniform electric field?

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