An electromagnet would have the greatest strength if its wire were wrapped around a core made of copper.
Electromagnetic strength
This is the strength of an electromagnet which increases with increase in the number of turns of the coil, thickness of the coil and magnetic field strength.
emf = NBA/t
The strength of an electromagnet also increases with increase in current and voltage flowing in the loop.
Copper is better conductor of electricity when compared to aluminum and iron.
Thus, an electromagnet would have the greatest strength if its wire were wrapped around a core made of copper.
Learn more about electromagnet here: https://brainly.com/question/12555869
#SPJ1
