# Equation handy for the recoil of an electron

Hey does anybody have an equation handy for the recoil of an electron passing through a magnetic field?

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## Answers and Replies

damgo
Hey, Kansas is in the hizzy.

Recoil? No, but the relevant eq is

F=qv x B

If the magnetic field is perpendicular to the electron's direction of motion, its path will thus trace out an arc of a circle with radius

r = (mv)/(qB)