Electrical Engineering ⇒ Topic : Moving Iron Instruments
Moving Iron Instruments:- Moving Iron instruments are of two types
. Attraction Type Moving Instruments:-These instruments are based on the principle that when an un magnetised soft iron piece is placed in the magnetic field of a coil then the piece is attracted towards the coil.
Since deflection O a 12
Repulsion type Moving Instruments :-These instruments are based on the principle of repulsion between the two iron pieces similarly magnetized. Since deflection O is proportional to square of current through the coil, therefore scale of such instruments in non-uniform being crowded in the beginning
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