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How far must the specimen be withdrawn with respect to the coil in demagnetization?(a) 00.7 inches(b) 26 inches(c) 18 inches(d) 4 inchesI had been asked this question during an interview.I would like to ask this question from Testing Aircraft Materials topic in section Testing Aircraft Materials of Aerospace Materials & Processes

Answer»

The CORRECT option is (c) 18 inches

Easy EXPLANATION: There are TWO methods of demagnetization. One of the methods involves withdrawing the specimen to a distance of eighteen inches away from the coil. This is to avail the EFFECT of the weak current.



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