Question
The magnetic field at the centre of a circular loop of wire of radius $r$ carrying current $I$ is given by the formula $$B=\mu_{0} \frac{I}{2 r}$$ Use this expression to find the magnetic field created by an electron as it rotates with speed $v$ in a circular orbit of radius $r$ around a nucleus.
Step 1
The time period is given by the formula $T = \frac{d}{v}$, where $d$ is the distance travelled and $v$ is the speed. In this case, the distance is the circumference of the circle, which is $2\pi r$. So, we have: \[T = \frac{2\pi r}{v}\] Show more…
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