What is the term used to describe a fixed difference in a magnetic field across space?

The term used to describe a fixed difference in a magnetic field across space is "Spatial Gradient." This concept is essential in understanding how magnetic fields change in strength and direction over a particular area. A spatial gradient indicates that there is a variation in the magnetic field, enabling the identification of how strong the field is at specific points.

In the context of magnetic resonance and imaging, gradients are crucial for spatial localization of signals, allowing for the detection of different tissues and structures in the body. This fundamental principle is utilized in MRI technology to create detailed images by varying the magnetic field in specific directions.

The other terms mentioned have different meanings. For instance, "Magnetic Flux" refers to the total magnetic field passing through a certain area and does not specifically address the differences across space. "Magnetic Field Strength" pertains to the intensity of the magnetic field at a given point, not the variation across a region. "Magnetic Induction," on the other hand, relates to the process by which a material becomes magnetized in the presence of a magnetic field and is not directly linked to spatial differences.