If the strength of the magnetic field produced $10\,cm$ away from a infinitely long straight conductor is ${10^{ - 5}}\,Weber/{m^2}$, the value of the current flowing in the conductor will be........$ampere$
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(a) $B = \frac{{{\mu _0}}}{{4\pi }} \cdot \frac{{2i}}{r}$ $==>$ ${10^{ - 5}} = {10^{ - 7}} \times \frac{{2i}}{{(10 \times {{10}^{ - 2}})}}$ $==>$ $i = 5\,A$
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