How are eddy currents generated in a conductor which is subjected to a magnetic field?

a) When a conductor is placed in a time-varying magnetic flux, the change in flux due to the varying magnetic field induces small loops in the conductor, and current flows through these loops according to Faraday's law. These currents are known as eddy currents.
b) Applications of eddy currents:
i) Electromagnetic breaking: Eddy current brakes use the drag force created by eddy currents to slow or stop moving objects. For example, electromagnetic brakes are used in railroad cars.
ii) Levitation: Separation of aluminum cans from other metals in an eddy current separator. Ferrous metals cling to the magnet, and aluminum is forced away from the magnet.
c) The disadvantages of eddy currents can be reduced by making thin strips instead of a block for the core of the induction because, as the blocks are made of thin strips, the number of possible loops reduces.