Force product is expressed in which unit?

The unit for force product is expressed as T²/m. This is derived from the concept of magnetic force, where the force experienced by a charged particle in a magnetic field can be described by the Lorentz Force Law.

In this context, T represents Tesla, which is the unit of magnetic flux density. The interaction of a magnetic field with a charged particle results in a force that is related to the intensity of the magnetic field (in Teslas) and is inversely proportional to distance (in meters). When we square the magnetic flux density (T²), we recognize that this describes how the field interacts over a distance, corresponding to the overall force experienced.

Expressing the force product in T²/m effectively captures this relationship, indicating how the intensity of the magnetic field impacts the resulting force at a given point in space. This makes the option T²/m the correct expression for force product in the context of magnetic resonance and related applications. Other options do not correctly represent the unit conventions associated with magnetic field interactions and force calculations.