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My Question:

What is the velocity of a beam of electrons taht go undeflected and magnetic fields of magnitude 8.8 x 10^3 V/m and 3.5 x 10^.9 T, respectively? what is the radius of the electron orbit if the electric field is turned off?

My Work:

V= E/B

V=(8.8 x 10^3 V/m)/(3.5 x 10^.9 T)

V=2.51 x 10^-6 m/s

and for theradius

r=mv/qB

r=(9.11 X 10^-31 kg)(2.51 x 10^-6 m/s)/(1.6 x 10^-19 coul)(3.5 x 10^-3 T)

r= .004m

Are these correct

Thank You

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# Velocity of a beam

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