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1

The formula, NI = 45000/(L/D), gives proper magnetising current for a coil, regardless of coil size as long as:

Correct Answer: The test piece is not larger than 1/10 the cross sectional area of the coil

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Non Destructive Testing and Evaluation MCQ: The formula, NI = 45000/(L/D), gives proper magnetising current for a coil, regardless of coil size as long as: | Extra Education