The effect is called the Lenz Effect. The moving magnet causes small magnetic fields, called eddy currents, to form in the metal (brass, aluminum foil/tube ...). These eddy currents have their own magnetic field (all electrical currents do). This is what is interacting with the moving magnet.
1 Limited use: The Angel Card can only be used in Victoriaâs Secret and PINK stores. 2  While you may also use the card at Bath & Body Works stores, you will not earn Angel Reward points on those purchases.
Discover gift cards can only be used in U.S. locations, according to its online FAQ. Visa gift cards can go either way. If the gift card states Valid only in the United States on the front, then the issuer -- usually a bank -- has decided it can be used just in the states, according to Visa's FAQ online.t can be used at participating international locations but will be converted to the local currency. The best way to find out if your gift card can be used other than stateside is to check the back of the card. If it's not there, find the terms and conditions or FAQs online.