Magnetic field at origin is 2k^ tesla. Which of the following current distribution could have caused it?

(1) B = μ0k2j^ (2) B = μ0i2R = 4π×10-7×1002×π×10-5 = 2k^(3) B = μ0i2πx = 4π×10-7×1002×π×10-5 = 2k^(4) B = μ0ni = 4π×10-7×1000×1042π = 2k^

Magnetic field at origin is 2k^ tesla. Which of the following current distribution could have caused it?

(1) B = μ0k2j^ (2) B = μ0i2R = 4π×10-7×1002×π×10-5 = 2k^(3) B = μ0i2πx = 4π×10-7×1002×π×10-5 = 2k^(4) B = μ0ni = 4π×10-7×1000×1042π = 2k^

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Magnetic field at origin is $2 \hat{k}$ tesla. Which of the following current distribution could have caused it?

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A current flowing on a plane parallel to $x y$ plane. The current is flowing in $+ v e x$ direction. Current $/$ length $= \frac{π}{4} \times 10^{7} A / m$ .

Current flowing in circular loop in $x y$ plane centered at origin current is flowing anticlockwise as seen from $+ v e z$ direction. $i = 100 A, r a d i u s = π \times 10^{- 5} m$ .