Question

1. some magnets are described as being ferromagnetic because:

a. they use electricity.
b. they are made of iron.
c. they are old.
d. they have two poles.

Explanation:

Ferromagnetic materials are those that can be strongly magnetized and are typically made of iron, nickel, cobalt, or their alloys. Option A is incorrect as using electricity is not the defining characteristic of ferromagnetic magnets. Option C is irrelevant as age has nothing to do with being ferromagnetic. Option D is a property of all magnets (not just ferromagnetic ones).

Answer:

B. They are made of iron.