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Where are the magnetic particles collected in concentration by electromagnetic separation?

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in Chemistry – Class 12 by (188k points)
Where are the magnetic particles collected in concentration by electromagnetic separation?

(a) Below the magnetic roller

(b) Above the magnetic roller

(c) Away from the magnetic roller

(d) On the conveyer belt

I got this question in an international level competition.

This interesting question is from Concentration of Ores in chapter General Principles and Processes of Isolation of Elements of Chemistry – Class 12

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The correct answer is (a) Below the magnetic roller

The explanation is: In electromagnetic separation, the powdered ore is dropped over a conveyer belt moving around two rollers, one of which has an electromagnet in it. As the ore particles roll over the belt, the magnetic particles are attracted by the magnetic roller. As a result, two heaps are formed separately. The heap collected below the magnetic roller contains magnetic particles while the heap away from the roller consists of non-magnetic particles.

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