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Q. |
Which of the following is false concerning a magnetic field in and around a hollow conductor as compared to that of a solid conductor of the same outside diameter when both are of the same magnetic material, and when the applied current is the same? |
A. | The field immediately outside the outer surface of the hollow conductor is greater |
B. | The field gradient inside the hollow conductor is steeper |
C. | The fields outside the conductors are the same |
D. | The fields are the same at the centre |
Answer» C. The fields outside the conductors are the same |
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Non Destructive Testing and Evaluation