A magnetic dipole is placed in a uniform magnetic field of intensity B , oriented along the direction of the field. If the magnetic dipole moment is M , then the maximum work an external agent can perform in rotating the dipole will be

Question

A magnetic dipole is placed in a uniform magnetic field of intensity B , oriented along the direction of the field. If the magnetic dipole moment is M , then the maximum work an external agent can perform in rotating the dipole will be (A) (1/2)MB (B) 4MB (C) 2MB (D) MB

Tardigrade Admin · Accepted Answer

The maximum work done by an external agent is W=U180 ° -U0 ° W=MB-(- M B) W=2MB

Q. A magnetic dipole is placed in a uniform magnetic field of intensity $B$ , oriented along the direction of the field. If the magnetic dipole moment is $M$ , then the maximum work an external agent can perform in rotating the dipole will be

$\frac{1}{2} MB$

$4 MB$

$2 MB$

$MB$

The maximum work done by an external agent is
$W = U_{18 0^{\circ}} - U_{0^{\circ}}$
$W = MB - (- MB)$
$W = 2 MB$

Q. A magnetic dipole is placed in a uniform magnetic field of intensity B , oriented along the direction of the field. If the magnetic dipole moment is M , then the maximum work an external agent can perform in rotating the dipole will be

21​MB

4MB

2MB

MB