Advantages eddy current heating

Advantages eddy current heating
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1) No heat transfer loss as heat is produced in job itself. So it has high efficiency. 2) As heat is produced in job itself so time required for heating is less. For e.g. in some cases operating time taken for heating is of only one second. 3) By simply controlling frequency, we can control temperature accurately. 4) By simply controlling frequency, depth of penetration of heat can be controlled easily. 5) Very thin material surface can be heated easily. 6) Operation is simple & automatic. 7) For heating low attention is required. 8) Heating can be taken place in vacuum or other special atmospheric condition where other methods are not possible. 9) It is clean and convenient method.

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Last Answer : B. Minimise eddy current loss

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Last Answer : B. Eddy current loss is reduced

8 The transformer core is laminated to A. Reduce the copper losses B. Reduce the core losses C. Reduce the eddy current losses D. None of the above

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Last Answer : C. Reduce the eddy current losses

17. Which type of loss is not common to transformer and rotating machines? A. Eddy current loss B. Copper loss C. Hysteresis loss D. Windage loss

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A ferrite core has less eddy current loss than an iron core because ferrites have (A) High resistance. (B) Low resistance. (C) Low permeability. (D) High hysteresis.

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Last Answer : (A) High resistance.