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WBCS Main Examination 2023 — Paper IV: General Studies II · Question 102 of 200

Q102
General SciencePhysics
Magnetic effect of current was discovered by
  1. a.Faraday
  2. b.Oersted
  3. c.Ampere
  4. d.Bohr

Answer: (B) Oersted

In 1820 Hans Christian Oersted saw a compass needle deflect near a current-carrying wire, discovering the magnetic effect of current. Faraday later discovered electromagnetic induction, Ampère quantified forces between currents, and Bohr worked on atomic structure.

Q101 Whole paperQ103