Moving Charges and Magnetism

Question: The magnetic induction due to an infinitely long straight wire carrying a current i at a distance r from wire is given by

1) $|B|\, = \left( {\frac{{{\mu _0}}}{{4\pi }}} \right)\frac{{2i}}{r}$

2) $|B|\, = \left( {\frac{{{\mu _0}}}{{4\pi }}} \right)\frac{r}{{2i}}$

3) $|B|\, = \left( {\frac{{4\pi }}{{{\mu _0}}}} \right)\frac{{2i}}{r}$

4) $|B|\, = \left( {\frac{{4\pi }}{{{\mu _0}}}} \right)\frac{r}{{2i}}$

Solution:

Explanation: No Explanation

Biot-Savart's Law Amperes Law

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