Transcription: To write data onto a floppy disk, your PC tells the drive to send tiny pulses of electricity through the heads. The pulses make the heads act like little electromagnets. Each head creates a magnetic field that reaches the surface of the disk. Remember the magnetic coating on the cookie? The magnetic field alters the tiny particles in this coating. If current runs through the heads one way, the particles are arranged with their north and south poles in one direction. But if current flows through the heads the opposite way, the polarity reverses. To read data from the disk, the read-write heads ...
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