Physics 2 Quiz
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MAGNETISM
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An infinitely long solid cylindrical conductor of radius RR carries a total current II. However, rather than being uniform, the current density varies with radial distance rr from the axis as J(r)=J0(1−rR)J(r) = J_0 \left(1 - \dfrac{r}{R}\right), where J0J_0 is a constant and 0≤r≤R0 \leq r \leq R.
Which expression correctly gives the magnetic field magnitude at a point inside the conductor at radius r<Rr < R?
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