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hysteresis
(redirected from Hysteresis effect)

    Also found in: Medical, Financial, Encyclopedia, Wikipedia 0.01 sec.

hysteresis

Phenomenon seen in the elastic and electromagnetic behaviour of materials, in which a lag occurs between the application or removal of a force or field and its effect.

If the magnetic field applied to a magnetic material is increased and then decreased back to its original value, the magnetic field inside the material does not return to its original value. The internal field ‘lags’ behind the external field. This behaviour results in a loss of energy, called the hysteresis loss, when a sample is repeatedly magnetized and demagnetized. The materials used in transformer cores and electromagnets are chosen to have a low hysteresis loss. Similar behaviour is seen in some materials when varying electric fields are applied (electric hysteresis). Elastic hysteresis occurs when a varying force repeatedly deforms an elastic material. The deformation produced does not completely disappear when the force is removed, and this results in energy loss on repeated deformations.



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? Mentioned in ? References in periodicals archive
 
In distinction to the hysteresis effect illustrated in Hamlet, in which intention is read back into action, the promises made in Jonson's plays entail intention colored deeply by uncertainty: does the promissor mean to fulfil his promise or is he merely pretending that he will?
Theaters of Intention: Drama and the Law in Early Modern England by Jordan, Constance / Shakespeare Studies
Magnetic hysteresis effects can also affect the geometric factor.
Hysteresis and Related Error Mechanisms in the NIST Watt Balance ... by Woodford, John / Journal of Research of the National Institute of Standards and Technology
1), for very smooth surfaces and high sliding speed, elastohydrodynamic effect becomes important and tends to eliminate the hysteresis effect and to build up a pressure profile which tends to separate the surfaces and decreases friction.
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