Wembley (1923 & 2007), London, England. The original Wembley, built in 1923 famed for its iconic twin towers, and for being home to the English National team, hosting FA Cup Finals and The 1966 World Cup. Replaced in 2007 with a new stadium, sporting a similarly iconic 134 metre Wembley Arch.
A magnetic field can be formed by passing electric current through a wire, and electromagnets work on this basic principal. Electromagnets are used for creating plenty of appliances ranging from motors, speakers, heads for tape drives, and hard disks; here's a brief insight to electromagnets.
The loudspeakers in your radio, television or stereo system consists of a permanent magnet surrounding an electromagnet that is attached to the loudspeaker membrane or cone. By varying the electric current through the wires around the electromagnet, the electromagnet and the speaker cone can be made to back and forth.ummary. Electromagnets are used in a number of devices, such as loudspeakers and tape recorders. Some electromagnets can be very strong and its power can be readily turned off and on, such as in junk yard electromagnets and electromagnetic locks.