Multiple choice general knowledge science & technology

Who created Metal Detector?

  1. Samuel Morse

  2. Alexander Graham Bell

  3. Douglas Engelbart

  4. Enrico Fermi
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Alexander Graham Bell invented the metal detector in 1881 to try to locate a bullet in President Garfield's body. Samuel Morse invented the telegraph, Douglas Engelbart developed the computer mouse, and Enrico Fermi was a nuclear physicist. The device used electromagnetic induction.

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