COMPUTER HARDWARE COMPONENTS FUNCTIONS
EXTERNAL AND INTERNAL STORAGE DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Spinning discs that contain tracks and sectors
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Floating gates to trap electrons
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A read-write head that moves across the magnetic discs
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Has pits and lands that represent 0 or 1
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Detailed explanation-1: -As the disk is spinning, a read/write head moves across its surface. To write data, the head magnetises or demagnetises a section of the disk that is spinning under it. To read data, the head makes a note of whether the section is magnetised or not. Magnetic devices are fairly cheap, high in capacity and durable.
Detailed explanation-2: -Commonly used devices that use magnetic storage include magnetic tape, floppy disks and hard-disk drives.
Detailed explanation-3: -Ans : A hard disk is a storage device that uses a rotating magnetic disk to store data.
Detailed explanation-4: -They store data in the form of magnetized spots in adjacent circular tracks on the surface of a metal cylinder. A single drum may carry from one to 200 tracks. Data are recorded and read by heads positioned near the surface of the drum as the drum rotates at about 3, 000 revolutions per minute.