- #1
Munky
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Homework Statement
An electron moves in a circular path perpendicular to a constant magnetic field with a magnitude of 1 mT. The angular momentum of the electron about the center of the circle is 4.00E-25 kg m^2/s.
m= 9.109E-31 kg
q= 1.602E-19 C
B= 0.001 T
I also know that the answer is
r = 5.00 cm
v = 8.78E6 m/s
Homework Equations
F=qvB
or
qvB=mv^2/r
or
r=mv/qB
The Attempt at a Solution
My problem is that I know I need to get either F, v, or r from the angular momentum, but I cannot find any way to do that. If I were able to solve for one of those variables, the other two are simple to figure. I have another similar question where I need to know how to do this... and for the life of me I can't figure it out.
Thanks for any help you can be.
Munky