Electricity

  • Placeholder: several colourful numbers
    problem

    Resistance

    Age
    16 to 18
    Challenge level
    Find the equation from which to calculate the resistance of an infinite network of resistances.
  • Hold still please
    problem

    Hold Still Please

    Age
    16 to 18
    Challenge level
    Can you arrange a set of charged particles so that none of them start to move when released from rest?
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