Two charges +q and -q are placed at a distanc | vedclass

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

Question

(B, C) In a uniform electric field $\vec{E}$, the force on charge $+q$ is $\vec{F}_+ = q\vec{E}$ and the force on charge $-q$ is $\vec{F}_- = -q\vec{E

Vedclass · Accepted Answer

The net force is independent of $a$

Vedclass · Answer

(B, C) In a uniform electric field $\vec{E}$, the force on charge $+q$ is $\vec{F}_+ = q\vec{E}$ and the force on charge $-q$ is $\vec{F}_- = -q\vec{E}$.The net force on the dipole is $\vec{F}_{net} = \vec{F}_+ + \vec{F}_- = q\vec{E} - q\vec{E} = 0$. Thus, the net force on the dipole always vanishes.The torque on the dipole is given by $\vec{	au} = \vec{p} 	imes \vec{E}$. Since the torque is defined as the cross product of the dipole moment and the electric field, it is a physical quantity and is independent of the choice of the coordinate system.Therefore, statements $(b)$ and $(c)$ are correct.

Similar Questions

$A$ wheel having mass $m$ has charges $+q$ and $-q$ on diametrically opposite points. It remains in equilibrium on a rough inclined plane in the presence of a vertical electric field $E$. Then the value of $E$ is

Two short electric dipoles are placed as shown. The energy of electric interaction between these dipoles will be

$A$ point electric dipole placed at the origin has a potential given by $V(r, \theta) = \frac{p \cos \theta}{4 \pi \varepsilon_0 r^2}$,where $\theta$ is the angle made by the position vector with the direction of the dipole. Then,

An electric dipole consisting of two opposite charges of $2 \times 10^{-6} \text{ C}$ separated by a distance of $3 \text{ cm}$ is placed in an electric field of $2 \times 10^5 \text{ N/C}$. The maximum torque acting on the dipole is:

The distance between the two charges $+q$ and $-q$ of a dipole is $r$. On the axial line at a distance $d$ from the centre of the dipole,the electric field intensity is proportional to:

Vedclass Test Series

Exam Paper Generator

Online Exam Module