What is the radius of the path of an electron (mass 9 x 10-31 kg and charge 1.6 x 10¬1ºC ) moving at a speed of 3 x 10'm/s in a magnetic field of 6 x 10-4T perpendicular to it? What is its frequency? Calculate its energy in keV .(1eV = 1.6 × 10-19 J).
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