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magnetic damping
Magnetic damping is a form of damping that occurs when a magnetic field moves through a conductor (or vice versa).
== Definition ==
When a magnetic field (magnet) moves through a conductor an eddy current is induced in the conductor due to the magnetic field's movement. The flow of electrons in the conductor creates an opposing magnetic field to the magnet which results in damping of the magnet and causes heating inside of the conductor similar to heat buildup inside of power cords. The loss of energy used to heat up the conductor is equal to the loss of kinetic energy by the magnet. Eddy currents induced in conductors are much stronger as temperatures approach cryogenic temperatures. This allows for critical damping for cryogenic applications and testing in the aerospace industry.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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