Dipole

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Dipole Meaning and Definition in Dictionary

Dipole Meaning and Definition from WordNet (r) 2.0
    dipole n
  1. a pair of equal and opposite electric charges or magnetic poles separated by a small distance
  2. an aerial half a wavelength long consisting of two rods connected to a transmission line at the center [syn: dipole antenna}]

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Dipole Meaning and Definition in Wikipedia


Dipole can mean two things in physics. The first is an electric dipole which separates the positive charge from the negative charge. A simple example of this dipole is a pair of electric charges with the same magnitude but with the opposite type of charge (positive and negative) and are separated by a small distance from each other. The second is a magnetic dipole, a closed circulation of electric current. A simple example is a single loop of wire with electric current flowing through it.

An important characeristic of dipoles is their dipole moment, which is a vector quantity with both a magnitude and direction. An example of an electric dipole moment occurring is in a pair of electric charges with opposite signs. The dipole moment would point from the negative charge towards the positive charge. The magnitude of the moment is equal to the strength of each charge multiplied by the distance separating between the charges. An example of a magnetic dipole moment occurring is in a wire loop with flowing current. The magnetic dipole moment would point through the loop (according to the right hand rule), with a magnitude equal to the current in the loop times the area of the loop.

[See more about Dipole at Dictionary 3.0 Encyclopedia]

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Dipole Sample Sentences in News


  • Famine in the Horn of Africa (1984) was caused by El Nino and currents in the Indian Ocean
    Oceanic patterns are important drivers of climatic variability. There is a clear link between periods of drought in the North Ethiopian Highlands and oceanic phases of El Nino, the Indian Ocean Dipole and the Southwestern Monsoons. Read more on this news related to 'Dipole'
  • Ultra-cold atom transport made simple
    "Schematic representation of the physical system consisting of a ring trap and two dipole waveguides for injecting neutral atoms into, extracting them from, and velocity filtering them in the ring waveguide." Image courtesy Loiko et al. Read more on this news related to 'Dipole'

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