Which equation correctly describes torque in a magnetic context?

The equation that correctly describes torque in a magnetic context is represented by the product of the magnetic moment (µ) and the magnetic field (B), denoted as T = µ * B. This relationship highlights the influence of the magnetic field on the magnetic moment of an object, generating torque.

In a simpler way, torque in a magnetic field is produced when a magnetic dipole moment is exposed to a magnetic field, which causes the dipole to experience a rotational force. This is essential in understanding how objects behave in magnetic environments, for example, how a compass needle aligns with Earth's magnetic field or how certain devices like electric motors operate. By recognizing that torque is a result of this interaction, we gain insight into various applications in magnetic resonance and other fields involving magnetism.

The other options fail to accurately represent how torque is defined in a magnetic context. They may depict formulas relevant in different domains or situations, but they do not encapsulate the core concept of torque arising from the interaction between a magnetic moment and a magnetic field, as captured by the correct equation.