An electric dipole having dipole moment P = q | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) An electric dipole consists of two equal and opposite charges,$+q$ and $-q$,separated by a distance $2\ell$. In a uniform electric field $E$,the f

Vedclass · Accepted Answer

zero and minimum

Vedclass · Answer

(D) An electric dipole consists of two equal and opposite charges,$+q$ and $-q$,separated by a distance $2\ell$. In a uniform electric field $E$,the force on the positive charge is $F_+ = qE$ in the direction of the field,and the force on the negative charge is $F_- = -qE$ opposite to the direction of the field. The net force on the dipole is $F_{net} = F_+ + F_- = qE - qE = 0$. The potential energy $U$ of an electric dipole in an electric field is given by $U = -P \cdot E = -PE \cos 	heta$. When the dipole moment $P$ is along the direction of the field,the angle $	heta = 0^{\circ}$. Thus,$U = -PE \cos(0^{\circ}) = -PE$,which is the minimum possible value (stable equilibrium).

An electric dipole having dipole moment $P = q \times 2\ell$ is placed in a uniform electric field $E$. The dipole moment is along the direction of the field. The force acting on it and its potential energy are respectively

Similar Questions

From which law and principle can the electric field of an electric dipole be obtained?

Three point charges $+q, -2q$ and $+q$ are placed at points $(x = 0, y = a, z = 0)$,$(x = 0, y = 0, z = 0)$ and $(x = a, y = 0, z = 0)$ respectively. The magnitude and direction of the electric dipole moment vector of this system are:

Two charges $+q$ and $-q$ are placed at a distance $b$ apart as shown in the figure. The electric field at a point $P$ on the perpendicular bisector as shown is

An electric dipole is placed in a non-uniform electric field,then . . . . . . .

The electric field at a point on the equatorial line of a dipole and the direction of the dipole moment:

Vedclass Test Series

Exam Paper Generator

Online Exam Module