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The magnetic vector potential for a line current will be inversely proportional to

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The magnetic vector potential for a line current will be inversely proportional to

(a) dL

(b) I

(c) J

(d) R

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This key question is from Magnetic Vector Potential topic in division Magnetostics of Electromagnetic Theory

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Correct answer is (d) R

Explanation: The magnetic vector potential for the line integral will be A = ∫ μIdL/4πR. It is clear that the potential is inversely proportional to the distance or radius R.

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