In 1831, which two scientists independently demonstrated that a changing magnetic field can produce an electric current?
AMichael Faraday and Joseph Henry
BAmpere and Ohm
CMaxwell and Hertz
DVolta and Galvani
Answer & Solution
Correct answer: A. Michael Faraday and Joseph Henry
1. The phenomenon of generating current from a magnetic field is known as electromagnetic induction.
2. The text states: "In 1831...English scientist Michael Faraday (1791–1862) and American scientist Joseph Henry (1797–1878) independently demonstrated that magnetic fields can produce currents."
3. The other scientist pairs listed are real physicists, but none of them is credited with this particular 1831 discovery in the text.
4. So the correct pair is Michael Faraday and Joseph Henry.
_Source: OpenStax Physics Ch 20 "Magnetism", p.692 §20.3 Electromagnetic Induction_
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