GK QUESTION#2960
Which statement describes a direct use of the magnetic attraction of an electromagnet? I. Separating magnetic materials from scrap or junk II. Sharpening a pencil by mechanically cutting wood and graphite
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Answer
A. Only I
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Explanation
Separating iron and other ferromagnetic scrap directly uses attraction by an electromagnet. Cutting a pencil to sharpen it is a mechanical operation; an electric motor in a powered sharpener is a different, indirect use of electromagnetism.