engineering recuitment PSPCL JE Electrical Mock Test 2024 Electromagnetic Theory Magnetostatics

What is the magnetic flux density at distance r due to a long conductor carrying current of I?

1
\(\frac{{\mu I}}{{4\pi r}}\)
2
\(\frac{{\mu I}}{{\pi r}}\)
3
\(\frac{{4\pi \mu I}}{r}\)
4
\(\frac{{\mu I}}{{2\pi r}}\)
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