Discussion :: GATE ECE
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An infinitely long uniform solid wire of radius a carries a uniform dc current of density j. The magnetic field at a distance r from the center of the wire is proportional to
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A.
r for r < a and 1/r2 for r > a
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B.
0 for r < a and 1/r for r > a
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C.
r for r < a and 1/r for r > a
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D.
0 for r < a and 1/r2 for r > a
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Answer : Option C
Explanation :
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