Can magnets damage your computer?


About 2700 years ago, a Cretan shepherd named Magnes was herding
his sheep at Magnesia – an area in Northern Greece. And suddenly, the nails in his shoes and the
metal tip of his staff got firmly stuck to the large black rock on which he was standing. To find the source of attraction he dug up
the Earth and found lodestone – which is basically a naturally occurring magnet. This type of rock was subsequently named after
Magnesia or Magnes himself. Today in this digital world, Magnets can be
a threat to our computing devices. But the great thing about magnets is that
they only affect electrons when they are moving. The force on an electron in a magnetic field
is proportional to its speed. If it is stationary, the force is zero. But why do magnets affect CRT monitors? Well a CRT monitor produces pictures on screen
when electrons fly towards the screen via an electron gun. Therefore presence of a magnet
nearby can permanently magnetize the CRT monitor. This can be fixed by degaussing or demagnetizing
the CRT monitor. But don’t worry, almost all LCD monitors
today have very less or no moving electrons. So even if magnets cause certain effects,
they will go away on restarting your monitor. Magnets are also said to affect Hard Drives.
No, not the little ones but a car-lifting junkyard magnet is capable of killing your
hard drive. This is because hard disk drive uses a strong
neodymium magnet to swing the read/write head which allows you to read and write data. Our phones and laptops are safe to use in
everyday life unless you put a giant magnet in their way.

28 thoughts on “Can magnets damage your computer?

  1. Other large magnets to be wary of: magnets in MRI Scanners. A cursory Google search suggests that most lifting electromagnets in junkyards produce a field with a strength of about 1 Tesla (or 1 T). The field stengths in many MRI Scanners can easily be at least 1.5 T or higher (the research scanner at my university has a field stength of 3 T, and I've heard that there are even some that could hypothetically go as high as 7 T, though I may be mistaken on that).
    Suffice to say, if you are getting a scan and the people prepping you tell you to put your cell phone or other devices into a locker, please listen to them.

  2. hello dude I met your friend PRADEEP Singh in train . he told me about you and your after effect friend and also about your USA lady who gives voice to your videos

  3. You make awesome videos keep the great work and one more thing what(Software/Application) do you use to make these videos.
    Thanks

  4. why if electron is stanitory it is not effect by magnet it is a charge only na please give me this question answer any one

  5. Nope, wrong. Magnets scramble up HDDs because HDDs use microscopic magnetic particles on the surface of the disk inside. When a super-strong magnet gets up close to an HDD, it quickly re-positions those little particles, thus erasing what the RW head wrote previously.

    It simply does not have anything to do with the actuator magnet that controls the RW head.

  6. You are missing important information about the hard drive. The main reason they are affected by large magnetic fils is not because of the arm but the fact that the data is stored magnetically. The arm can be replaced but the magnetic field of the dad can not be fixed very easy if at all.

  7. So can i put my lcd moniter next to my old picture tube tv which have their speakes facing towards the side of my moniter.please answer me.

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