Physics for IGCSE & O level - Magnets And Currents (Section 6 - No. 32)
How does a hard disk drive store information?
By using static electricity.
By creating permanent magnets on a spinning disk.
By using electromagnets to change the direction of the magnetic field.
By generating heat to encode data.
คำอธิบาย
Using electromagnets to change the direction of the magnetic field.