An electric dipole placed in a uniform electric field will have minimum potential energy when the dipole moment is inclined to the field at an angle

Question

An electric dipole placed in a uniform electric field will have minimum potential energy when the dipole moment is inclined to the field at an angle (A)  π  (B)  (π /2)  (C) zero (D)  (3π /2)

Tardigrade Admin · Accepted Answer

Since, U=- vecp vecE ⇒ U=-pE cos θ So, U is minimum when, θ =0°

Q. An electric dipole placed in a uniform electric field will have minimum potential energy when the dipole moment is inclined to the field at an angle

$π$

$\frac{π}{2}$

zero

$\frac{3 π}{2}$

Since, $U = - p E$
$\Rightarrow$ $U = - pE cos θ$
So, $U$ is minimum when, $θ = 0^{\circ}$

Q. An electric dipole placed in a uniform electric field will have minimum potential energy when the dipole moment is inclined to the field at an angle

π

2π​

zero

23π​

Since, U=−p​E ⇒ U=−pEcosθ So, U is minimum when, θ=0∘

$π$

$\frac{π}{2}$

$\frac{3 π}{2}$

Since, $U = - p E$
$\Rightarrow$ $U = - pE cos θ$
So, $U$ is minimum when, $θ = 0^{\circ}$