A point dipole with dipole moment, p^{ {\to}} = p_0 k^{{∧}} , is kept at the origin. An external electric field given by, E^{ {\to}} = E_0 (2i^{{∧}} - 3 j^{{∧}}+4 k^{{∧}} ) , is applied on it. Which one of the following statements is true?

Correct Answer is : The force on the dipole is zero while torque rotates the dipole on the xy-plane

The force on the dipole is zero while torque rotates the dipole on the xy-plane

The force on the dipole moves it along the direction of electric field

The interaction energy between the dipole and electric field is zero

The potential due to the dipole alone on the xy-plane with z = 0 depends on the value of p_0

The application of the electric field orients the dipole along the – k ^{{∧}} direction

KEAM 2019 Physics and Chemistry Paper

Question : 4 of 120

Marks: +1, -0

A point dipole with dipole moment,

→

=p0

∧

, is kept at the origin. An external electric field given by,

→

= E0 (2

∧

−3

∧

) , is applied on it. Which one of the following statements is true?

The force on the dipole is zero while torque rotates the dipole on the xy-plane
The force on the dipole moves it along the direction of electric field
The interaction energy between the dipole and electric field is zero
The potential due to the dipole alone on the xy-plane with z = 0 depends on the value of p0
The application of the electric field orients the dipole along the –
∧
k
direction

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