A long straight wire of radius R carries a current density J = kr A/m² where k is a constant. The magnetic field for r

Question

A long straight wire of radius R carries a current density J = kr A/m² where k is a constant. The magnetic field for r < R is (Hint: Current enclosed .) A) $\mu$₀kr²/2 B) $\mu$₀kr²/3 C) 2 $\pi$$\mu$₀kr D) 2 $\pi$$\mu$₀kr/2 E) none of the above

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The Answer of A long straight wire of radius R carries a current density J = kr A/m² where k is a constant. The magnetic field for r < R is (Hint: Current enclosed .) A) $\mu$₀kr²/2 B) $\mu$₀kr²/3 C) 2 $\pi$$\mu$₀kr D) 2 $\pi$$\mu$₀kr/2 E) none of the above

A Long Straight Wire of Radius R Carries a Current μ\muμ

A Long Straight Wire of Radius R Carries a Current $\mu$