Question

How does a dipole behave when it is placed in a uniform magnetic field?

• A. It experiences both a net force and torque.
• B. It experiences torque but no net force.
• C. It remains stationary with no force or torque acting on it.
• D. It experiences a net force but no torque.

Answer 1

Answer:

B. It experiences torque but no net force.

When a magnetic dipole is placed in a uniform magnetic field, it experiences a torque that tends to align the dipole moment with the direction of the field, but no net force. The torque (τ) experienced by a magnetic dipole moment (m ) in a uniform magnetic field (B ) is given by the formula: τ=m ×B The magnitude of the torque is given by: τ=mBsinθ where θ is the angle between the magnetic dipole moment and the magnetic field.