Q: What are the strongest magnets made?


Read this paragraph and choose the correct option from the provided answers:

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.

 Choices:

- permanent magnets

- polarized magnets

- natural magnets

- electromagnets


A:
electromagnets