Question
A current of 10A is established in a long wire along the positive z-axis. Find the magnetic field $\overrightarrow{\text{B}}$ at the point (1m, 0, 0).
✓
Answer
$\text{i} = 10\text{A},\text{d} = 1\text{m}$$\text{B}=\frac{\mu_0\text{i}}{2\pi\text{r}}=\frac{10^{-7}\times4\pi\times10}{2\pi\times1}$
$=20\times10^{-6}\text{T}=2\mu\text{T}$
Along +ve Y direction.
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