Question

How can I calculate the Teslas and resistance of an electromagnet?

Answer 1

⏳⌛Then to summarise, the strength or intensity of a coils magnetic field depends on the following factors. Thenumber of turns of wire within the coil. The amount of current flowing in the coil.⏳⌛

Answer 2

 this kind of calculus is common. If you assume the iron has an infinite permeability, the only reluctances of your circuit are the air-gaps. Your mmf is n*i, you can therefore solve the circuit, find the magnetic flux and then the magnetic flux density. It will be a rough estimate though.