Q. What is the magnetic field strength at the surface of a 25mm diameter bar as compared to that at the surface of a 50mm diameter bar, each carrying 1000 amps of current?

(A) Twice
(B) One half
(C) One quarter
(D) Four times

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✅ Correct Answer: (A) Twice

Published by Mr. Dubey ⭐ 111.54K Points at 21-Sep-2023 07:17 pm in Non Destructive Testing and Evaluation

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