Magnetism and Electromagnetism - Key Terms

    Cards (16)

    • Pole
      the two opposite regions in a magnet, where the magnetic field is concentrated; can be north or south
    • Permanent magnet
      an object that produces its own magnetic field
    • Induced magnet
      an object that becomes magnetic when placed in a magnetic field
    • Flux density
      a measure of the density of the field lines around a magnet
    • Solenoid
      a coil of wire partially surrounding an iron core, which is made to move inside the coil by the magnetic field set up by a current; used to convert electrical to mechanical energy
    • Uniform
      unchanging in form, quality or quantity; regular
    • Electromagnet
      a magnet consisting of an iron or steel core wound with a coil of wire, through which a current is passed
    • Motor effect
      the force experienced by a current carrying conductor when it is placed in a magnetic field, which is used to create movement in electrical motor
    • Flux density
      a measure of the density of the field lines around a magnet
    • Commutator
      a device used to reverse the direction of flow of an electric current in motors and generators
    • Generator effect
      to induce a potential difference (voltage) using magnetic fields and conductors
    • Induced
      to produce (a potential difference) or transmit (magnetism)
    • Alternator
      an electrical machine that uses a rotating magnet inside a fixed coil of wire to generate an alternating current
    • Dynamo
      a device that uses a rotating coil and a fixed magnet to convert mechanical energy into a direct curren
    • Microphone
      a device that uses the generator effect to convert soundwaves into electrical signals
    • Transformer
      a device that transfers an alternating current from one circuit to another, with an increase (step-up transformer) or decrease (step-down transformer) of voltage
    See similar decks