Multiple choice

When did the study of magnetism start? (A book proposing the earth as a giant magnet published)

  1. 1600

  2. 1650

  3. 1700

  4. 1750

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A Correct answer
Explanation

William Gilbert published his landmark treatise "De Magnete" in the year 1600, which proposed that the Earth itself behaves as a giant magnet. This publication is widely considered the beginning of the modern scientific study of magnetism.