Which electromagnet will produce the strongest magnetic force.
The strength of an electromagnet's magnetic force is determined by various factors such as the number of turns in the coil of wire, the amount of current flowing through the wire, the material of the core (if any), and the shape and size of the electromagnet.
Generally, an electromagnet with a larger number of turns in the coil, a higher current flowing through the wire, and a magnetic core made of a material with high magnetic permeability (such as iron) will produce a stronger magnetic force. Additionally, electromagnets that are designed with a larger size and shape will typically have a stronger magnetic force as well.
Therefore, an electromagnet with a large number of turns, high current, iron core, and larger size and shape will produce the strongest magnetic force.