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  1. S

    How does a permanent magnet lift iron filings

    Evryone knows that the work done by a magnetic field is zero. Then how does a permanent magnet lift iron filings.
  2. S

    How does the magnetic field lift iron objects?

    We all know that the work done by the magetic field is zero. But, how does the magnetic field lift iron objects?
  3. S

    Hi, I was just wondering

    If False the same as Not true? Undoubtendly, this is a question in Quantum Mechanics which was why I put it up here and not a Philosophical Question though it may sound like one... Sridhar
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    Plastic disc with a coil wound around is axis of rotation

    A question, I have a plastic disc with a coil wound around is axis of rotation. The coil carries current I. Now the disc carries charges at its circumference. Now the current flowing in the coil is brought to 0 instantaneously. This creates Electric Field to be produced that travel in...
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