What type of magnetic field is created when a magnetic field is induced in a part with prods spaced 152 mm apart?

When a magnetic field is induced in a part using prods that are spaced a specific distance apart, the characteristics of the magnetic field generated depend on the arrangement of the prods and the properties of the electric current used in conjunction with them. With prods positioned 152 mm apart, the electrical current flows from one prod to the other, creating a magnetic field that encircles the area between them. This configuration typically results in a circular or transverse magnetic field around the prods.

In magnetic particle testing, the circular field allows for the effective detection of surface and near-surface discontinuities. The magnetic field lines form closed loops around the prods, which is why the induced field is described as circular. This characteristic is critical in ensuring that magnetic particles are attracted to any flaws or discontinuities that might exist on the surface of the part being tested.

The other types of fields mentioned do not accurately describe the phenomenon occurring with prods set at that distance. A radial field would imply lines of force radiating outward from a central point, which is not the case here. A longitudinal field typically refers to a field that aligns with the length of the part being tested, and a linear field suggests a uniform distribution along a straight axis, none of which