Moving Charges and Magnetism

Question: A current iampere flows along the inner conductor of a coaxial cable and returns along the outer conductor of the cable, then the magnetic induction at any point outside the conductor at a distance rmetre from the axis is

1) $\infty $

2) Zero

3) $\frac{{{\mu _0}}}{{4\pi }}\frac{{2i}}{r}$

4) $\frac{{{\mu _0}}}{{4\pi }}\frac{{2\pi \,i}}{r}$

Solution:

Explanation: No Explanation

Biot-Savart's Law Amperes Law

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