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.
You can use a Nectar card to collect points with hundreds of retailers including, Sainsbury's, BP, Homebase, Expedia or when you pay your bills with EDF energy. However, there are ways in which you can maximise your points.We run through the Nectar card scheme and how you can make the most from it.oints can be spent on thousands of things from cinema trips to days out, but the value of the points varies. For example, a Nectar point spend in-store at Sainsbury's is worth 0.5p, yet many other Nectar Card redemptions work out better than this.