Summary: Episode 016 The dark “mag-stripe” on your credit card is made of iron-containing particles, each of which is a magnet with a north and south pole. The information on your card is stored by making magnetic patterns, in which the poles...
Summary: Episode 016 The dark “mag-stripe” on your credit card is made of iron-containing particles, each of which is a magnet with a north and south pole. The information on your card is stored by making magnetic patterns, in which the poles...