What are the advantages of application of eddy currents ?
Answers
The advantages of eddy current testing are: Sensitivity to surface defects. Able to detect defects of 0.5mm in length under favourable conditions. Can detect through several layers.
Answer:
The following are the advantages of eddy current
(1) Diathermy :-
These are used for deep heat treatment i.e localised heating of tissue in human body this treatment is called diathermy .
(2)
Concept of eddy current is used in energy meters to record the consumption of electricity .
(3) Speedometer :-
The eddy currents are produced in the aluminium drum in which a Magnet attached to the axel of the wheel rotates according to the speed o the vehicle . the pointer attached to the from us reflected in the direction of the rotation if the drum .
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(4) Electromagnetic breaks ,:-
These are used in trains the large eddy current are produced in the metallic drum which oppose the motion of the motion .
(5). Dead beat galvanometer :-
Electromagnetic damping is used to stop coil in w shorter interval of time . when the coil wound over a Metallic frame us deflected , eddy currents are produced in the metallic frame which oppose the the motion of the coil .
(6)
Induction frame makes use of heating effect of eddy current .
(7)
Induction motor or a.c motor also works by eddy current.
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