The strength of the magnetic fields produced by a torus and a bolt depends on factors such as size, shape, current type, and material. Generally, torus-shaped objects can generate stronger magnetic fields due to their design, which facilitates concentrated current flow. However, a bolt with a larger diameter and higher current can also create a significant magnetic field. To accurately compare the magnetic strengths, consulting a physicist or conducting experiments is recommended. Understanding these variables is crucial for a precise evaluation of magnetic field strength.