Correct option is B
Magnetic fringing refers to the phenomenon where magnetic flux lines spread out at the edges of an air gap in a magnetic circuit, effectively increasing the area of the gap and causing a decrease in magnetic flux density within that area.
Magnetizing force: Magnetizing force is the product of current and the number of turns in a coil, which determines the strength of the magnetic field produced. It's not related to the spreading of magnetic flux at the edges of an air gap.
Magnetic hysteresis: Magnetic hysteresis describes the lag in the magnetization of a ferromagnetic material when the applied magnetic field changes. It's a property of the material itself, not related to the behavior of magnetic flux in an air gap.
Magnetic leakage: Magnetic leakage refers to the portion of magnetic flux that escapes the intended path and does not contribute to the useful magnetic field. While this can occur in various situations, it's distinct from the phenomenon of fringing, which specifically concerns the behavior of flux lines at the edges of an air gap.
