A long cable is constructed of a solid conductor of radius ' r ' in a co-axial hollow cylindrical conductor of inner and outer radii R 1 and R 2 respectively. I 0 current flows in both

Question

A long cable is constructed of a solid conductor of radius ' $r$ ' in a co-axial hollow cylindrical conductor of inner and outer radii $R_{1}$ and $R_{2}$ respectively. $I_{0}$ current flows in both the conductors in opposite directions. The magnetic field $B$ at a distance $x$ from the axis of the cable is

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Answer:

A, B, C, D

Solution:

Apply ampere's law

$\oint B \cdot d ℓ = μ_{0} i$

TestHub · Accepted Answer

Apply ampere's law ∮ B ⋅ d ℓ = μ 0 ​ i

Physics - Magnetism Question with Solution | TestHub

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