Applications of Magnets

[Permanent Magnets]

1. Magnetic strip on cards
http://money.howstuffworks.com/personal-finance/debt-management/magnetic-stripe-credit-card.htm
external image Magnetic-Strip-Cards-Promotion-Cards.jpg

2. Magnetic Door catch

external image door-stop-266185x.jpg


[Electromagnets]

3. Audio and Video tapes

Recording involves magnetising the tape with an electromagnet. Sounds or picture are represented in the form of varying currents.These currents will cause the electromagnet (the tape head) to magnetise the tape according to the picture or sound they represent.
http://electronics.howstuffworks.com/gadgets/audio-music/cassette.htm


4. Reed Switch
external image read1a.jpg


5. Magnetic Relay
http://www.howstuffworks.com/relay.htm

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Do you Know?

Neodymium magnets are very powerful magnets. What can you do with them? Just for laughs......