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The magnetic effect of current was discovered by

  1. Faraday
  2. Millikan
  3. Oersted
  4. Thomson

Answer (Detailed Solution Below)

Option 3 : Oersted
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Detailed Solution

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CONCEPT:

  • Oersted’s experiment: Hans Christian Oersted was a Danish scientist who explored the relationship between electric current and magnetism.
    • The wire will carry a current that creates a magnetic field around itself. Bringing the compass near the wire or in the loop will cause the compass needle to move.
    • The current had produced a magnetic field strong enough to cause the compass needle to turn.

Pratik SBI PO 17 July 2018 25q (2) 69

Pratik SBI PO 17 July 2018 25q (2) 70

EXPLANATION:

  • Oersted’s experiment explains that when an electric current passes through a conducting wire, a magnetic field is produced around the wire. 
  • Thus the magnetic effect of current was discovered by Oersted. So option 3 is correct.
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