Metallic (nonferromagnetic) and nonmetallic particles in a solid waste may be separated as follows. The waste is allowed to slide down an incline over permanent magnets. The metallic particles slow down as compared to the nonmetallic ones and hence are separated. Discuss the role of eddy currents in the process.
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The role of eddy currents in the process are discussed as follows
Explanation:
- If solid waste is allowed to slip over a permanent magnet, the metallic particles cause an emf.
- This is because in this situation, the magnetic flux associated with the particles varies. This induced emf contrasts its cause, i.e. downward motion along the inclined plane of the permanent magnet, according to Lenz's law.
- By contrast, non-metallic or isolating particles are free of such effects. As a consequence, the metal particles slow down, separating them from the waste (or non-metallic particles).
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