Question
Compute the magnitude of the magnetic field in air at a point $6.0$ $\mathrm{cm}$ from a long straight wire carrying a current of $9.0 \mathrm{~A}$.
Step 1
This is done by multiplying the given distance by $10^{-2}$. So, $r = 6.0 \, \text{cm} = 6.0 \times 10^{-2} \, \text{m}$. Show more…
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