Which of the following would likely create the strongest electromagnet?

The creation of a strong electromagnet relies on several key factors: the material of the core, the amount of current flowing through the wire, and the configuration of the wire itself. A coiled wire around a soft iron core with substantial current effectively amplifies the magnetic field produced by the flow of electricity.

Soft iron is particularly effective in this context because it can be magnetized quickly and easily, making it ideal for use in electromagnets. When wire is coiled around this iron core, the magnetic fields generated by individual loops of wire combine to produce a much stronger overall magnetic field. The strength of the electromagnet increases with the number of coils and the amount of current; therefore, having substantial current flowing through the wire enhances the magnetic effect significantly.

In contrast, other options lack either the optimal core material, insufficient current, or a proper configuration, which makes them less effective in producing a strong magnetic field. Thus, the combination of a coiled configuration, soft iron for the core, and substantial current ensures that this option creates the strongest electromagnet.