An electron with kinetic energy 490 kev circles in a plane, Ask an Expert

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An electron with kinetic energy 4.90 keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 10.0 cm. Find the following values.

(a) the speed of the electron

(b) the magnetic field

(c) the frequency of circling

(d) the period of the motion

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