Please answer the following question: Answer the following question given this paragraph: An electromagnet is a solenoid wrapped around a bar of iron or other ferromagnetic material. The magnetic field of the coil magnetizes the bar, which adds to the strength of the magnetic field. Electromagnets are the strongest magnets made. Q: What are the strongest magnets made? Choices: - permanent magnets - polarized magnets - natural magnets - electromagnets A:
A:
electromagnets