- #1
bennyq
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Homework Statement
In Niels Bohr's 1913 model of the hydrogen atom, an electron circles the proton at a distance of 5.29 E-11 m with a speed of 2.19E6 m/s. Compute the magnitude of the magnetic field this motion produces at the location of the proton.
Homework Equations
∫B.ds = μI
The Attempt at a Solution
I found the time it takes the electron to circle the proton,
then the current(I)
by dividing the Q(electron)/time
then i take ds to be 2∏r and B to be constant for the integral..
I got 3.99T, the solution gets 12.5T and uses 2r for the vector ds around the path.
Not sure how the path can be 2r?