4 ms·

In the future, airliners could be catapulted into the sky by electric motors

• lutusp 14y ago
  It's a shame the submitter (apparently) didn't see the pun in "Proof by induction" and use it as his tag instead of the subtitle. Whoever composed the article's title knows something about electricity, as well as having an irresistible inclination toward word-play.
  • corporalagumbo 14y ago
    Interesting, could you explain the pun?
    • lutusp 14y ago
      "Induction" in electronics refers to the fact that electric and magnetic fields are intertwined in nature. A moving magnet produces an electric current in an adjacent conductor, and (in a perfect symmetry) an electric current produces a magnetic field. These effects are called "induction": http://en.wikipedia.org/wiki/Electromagnetic_induction http://en.wikipedia.org/wiki/Electromagnetic_induction A quote: "Electromagnetic induction is the production of an electric current across a conductor moving through a magnetic field."