Electricity & Magnetism

Amanda C. (United States of America)
19 words 101 learners

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  1. electromagnetism
    a physical force produced from the interaction of charged particles
    Electromagnetism is a branch of physical science that describes the interactions of electricity and magnetism, both as separate phenomena and as a single electromagnetic force.
  2. electromagnetic wave
    radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
    Electromagnetic waves differ from each other only in amplitude, frequency, and orientation (polarization).
  3. negative charge
    the state of having a surplus of electrons
    It is now known that electric charges occur in two different forms, positive charges and negative charges.
  4. positive charge
    the state of having a deficiency of electrons
    It is now known that electric charges occur in two different forms, positive charges and negative charges.
  5. electromagnetic
    pertaining to or exhibiting magnetism produced by electric charge in motion
    Electricity and magnetism are manifestations of a single underlying electromagnetic force.
  6. electric charge
    the quantity of unbalanced electricity in a body (either positive or negative) and construed as an excess or deficiency of electrons
    Some of the rules of electrostatics, the study of electric charges at rest, were first noted by the ancient Romans, who observed the way a brushed comb attracted particles.
  7. radio wave
    an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m
    The different frequencies are given a variety of names, from radio waves (at very low frequencies), to visible light itself, and up to the high-frequency x-rays and gamma rays.
  8. photon
    a tiny bundle of matter that transmits light
    Isaac Newton had formerly thought of light as consisting of particles (photons), but the particle theory of light was unable to explain light's wave nature, as revealed in diffraction and similar phenomena.
  9. electron
    an elementary particle with negative charge
    An atom's electrons generally carry the negative charge in matter, while the positive charge resides with the protons inside the atomic nucleus.
  10. electric current
    a flow of electricity through a conductor
    A moving electric current creates a magnetic field, and a magnetic field can induce movement of charges (electric current).
  11. magnetic pole
    either of two points where the lines of force of the Earth's magnetic field are vertical
    In fact, it is known that Earth's magnetic poles have changed positions in the past.
  12. magnetic field
    the lines of force surrounding a permanent magnet or a moving charged particle
    A moving electric current creates a magnetic field, and a magnetic field can induce movement of charges (electric current).
  13. magnetism
    attraction for iron
    Electricity and magnetism are manifestations of a single underlying electromagnetic force.
  14. proton
    a stable particle with positive charge
    An atom's electrons generally carry the negative charge in matter, while the positive charge resides with the protons inside the atomic nucleus.
  15. nucleus
    a part of the cell responsible for growth and reproduction
    An atom's electrons generally carry the negative charge in matter, while the positive charge resides with the protons inside the atomic nucleus.
  16. magnetic
    of or relating to or caused by attraction for iron
    A moving electric current creates a magnetic field, and a magnetic field can induce movement of charges (electric current).
  17. magnet
    a device that attracts iron and produces lines of force
    A small magnet that can hold or suspend an object demonstrates this fact.
  18. electric
    using or providing the flow of charge through a conductor
    A moving electric current creates a magnetic field, and a magnetic field can induce movement of charges (electric current).
  19. electricity
    a physical phenomenon that can produce light, heat and power
    Electricity and magnetism are manifestations of a single underlying electromagnetic force.
Created on Thu Jul 19 09:17:32 EDT 2012

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