The other day my electric toothbrush died on me. I asked my wife to buy me a new toothbrush the next time she was at the store. I was quite surprised that the model she bought is recharged through a method called induction. http://en.wikipedia.org/wiki/Electromagnetic_induction For those who don't know: induction is a method of transferring electricity wirelessely through a coil. Most people probably don't think much about induction, but for an engineer like me this is an engineering feet being used in an every day product.
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