A ferromagnetic material is subjected to a strong magnetic field and afterward acts as a permanent magnet. Why does this occur?
The magnetic field aligns the magnetic domains mainly in one direction.
The magnetic field gives the ferromagnetic material an electric charge.
Long-range electric currents circulating in the iron make it magnetic.
The motion of the iron nuclei produces a magnetic field.
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adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).