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An instrument used to measure magnetic flux. It is used in conjunction with a coil (the search coil) and resembles a moving-coil galvanometer except that there are no restoring springs. A change in the magnetic flux induces a momentary current in the search coil and in the coil of the meter, which turns in proportion and stays in the deflected position. This type of instrument has been largely superseded by a type using the Hall probe (see Hall effect).

Subjects: Physics.

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