(B) The dipole moment $p$ is given by $p = q \times (2a)$,where $q = 2 \times 10^{-6} \ C$ and $2a = 3 \times 10^{-2} \ m$.$p = (2 \times 10^{-6}) \ti

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(B) The dipole moment $p$ is given by $p = q \times (2a)$,where $q = 2 \times 10^{-6} \ C$ and $2a = 3 \times 10^{-2} \ m$.$p = (2 \times 10^{-6}) \times (3 \times 10^{-2}) = 6 \times 10^{-8} \ Cm$.The torque $\tau$ on a dipole in an electric field $E$ is given by $\tau = pE \sin \theta$.For maximum torque,$\sin \theta = 1$,so $\tau_{max} = pE$.$\tau_{max} = (6 \times 10^{-8} \ Cm) \times (2 \times 10^{5} \ N/C)$.$\tau_{max} = 12 \times 10^{-3} \ Nm$.

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

Difficult

An electric dipole consists of two equal and opposite charges of $2 \ \mu C$ separated by a distance of $3 \ cm$. If it is placed in an external electric field of $2 \times 10^{5} \ N/C$,the maximum torque experienced by it is:

A
$12 \times 10^{-1} \ Nm$
B
$12 \times 10^{-3} \ Nm$
C
$24 \times 10^{-3} \ Nm$
D
$24 \times 10^{-1} \ Nm$

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Chapter

Electric Charges and Fields

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Electric Dipole and Electric Field

An electric dipole consists of two opposite charges each of magnitude $1 \,\mu C$ separated by a distance of $2 \,cm$. The dipole is placed in an external field of $10^5 \,N/C$. The maximum torque on the dipole is ......... $Nm$.

Easy

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Determine the electric dipole moment of the system of three charges,placed on the vertices of an equilateral triangle,as shown in the figure.

DifficultJEE MAIN 2019

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At the midpoint of the axis of an electric dipole,which of the following is true?

Easy

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Two charges $+q$ and $-q$ are kept at a certain distance apart. Then, at any point on the right bisector of the line joining the two charges:

EasyTS EAMCET 2008

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What is the electric potential at a point in the equatorial plane of an electric dipole?

Medium

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An electric dipole consists of two equal and opposite charges of $2 \ \mu C$ separated by a distance of $3 \ cm$. If it is placed in an external electric field of $2 \times 10^{5} \ N/C$,the maximum torque experienced by it is:

Similar Questions

An electric dipole consists of two opposite charges each of magnitude $1 \,\mu C$ separated by a distance of $2 \,cm$. The dipole is placed in an external field of $10^5 \,N/C$. The maximum torque on the dipole is ......... $Nm$.

Determine the electric dipole moment of the system of three charges,placed on the vertices of an equilateral triangle,as shown in the figure.

At the midpoint of the axis of an electric dipole,which of the following is true?

Two charges $+q$ and $-q$ are kept at a certain distance apart. Then, at any point on the right bisector of the line joining the two charges:

What is the electric potential at a point in the equatorial plane of an electric dipole?

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