(a) A monoenergetic electron beam with e...

(a) A monoenergetic electron beam with electron speed of 5.20 × 106 m `s^(–1)` is subject to a magnetic field of 1.30 × `10^(–4)` T normal to the beam velocity. What is the radius of the circle traced by the beam, given e/m for electron equals `1.76 xx 10^(11)C kg^(–1)`.
(b) Is the formula you employ in (a) valid for calculating radius of the path of a 20 MeV electron beam? If not, in what way is it modified?

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