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pinch effect

noun Physics.
  1. the tendency of an electric conductor or stream of charged particles to constrict, caused by the action of a magnetic field that is produced by a flow of electricity.
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Origin of pinch effect

First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for pinch effect

pinch effect

noun
  1. the constriction of a beam of charged particles, caused by a force on each particle due to its motion in the magnetic field generated by the movement of the other particles
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012