Magnetostriction is what makes transformers hum. The magnetic field changes the shape of the material turning it into a sort of loudspeaker. https://eng.libre

Magnetostriction is what makes transformers hum. The magnetic field changes the shape of the material turning it into a sort of loudspeaker. https://eng.libretexts.org/Bookshelves/Materials_Science/Supplemental_Modules_(Materials_Science)/Magnetic_Properties/Magnetostriction https://eng.libretexts.org/Bookshelves/Materials_Science/Sup...