Question: An electron that has been accelerated through a (100-mathrm{V}) potential difference moves in a circular orbit perpendicular to a uniform magnetic field of magnitude 0.4

An electron that has been accelerated through a $100-\mathrm{V}$ potential difference moves in a circular orbit perpendicular to a uniform magnetic field of magnitude 0.4 T. For this electron, determine

(a) its speed,

(b) its angular frequency and period of motion,

(c) the radius of its orbit.

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