WHY SHOULD WE KEEP MAGNETS AWAY FROM CASSETTES,MOBILES,MUSIC SYSTEM,CD AND THE COMPUTER.
FAST ON 11 TH MARCH MY SCIENCE EXAM IS THERE
Hi Prakhar Bindal
Cassettes and computer "floppy" disks use magnetic fields to store the information. Storing a cassettes (or reel-to-reel) or floppy disk next to them will erase them
Oh, and as for the CD, that is optic media. There is a thin sheet of metal in there with non-reflective spots burnt in to it. Magnets will not mess with them. They use light to read and write. Unless, maybe, you used the magnet to scratch up the surface of the disc
Mobiles also use magnet and magnet will attract the magnet inside it so we should not keep magnet near it as in the same case of computer also
The cassettes use a thin film coated with ferric oxide. The magnetic moments (tiny magnets) of the film align in a special manner when we record data on the cassette. When we place the cassette near to a magnet, the alignment of the magnetic moments on the cassette will change according to the magnetic field produced by the magnet. This causes the data loss from the cassette.
The mobile phones make use of electromagnetic signals for communication. When magnets are placed near the mobile phone, it will reduce the signal reception capability of the mobile.
Magnets will not harm the CDs or DVDs as they use optical recording.
The magnetic field produced by the magnet will affect the CRT based TV and computer monitors. The monitors and TVs use a metal plate at the front of the picture tube, to focus electron beams from the electron gun. This plate is known as shadow mask. When this plate got magnetized from external magnetic fields, it produces discolouration at that point.
The introduction of magnets near the radio receivers will increase the noise of the radio.
Good work @ Abhinav!! Keep writing!!Cheers!!