An electron of energy 400 ev moves at right angles to a
An electron of energy 400 eV moves at right angles to a uniform magnetic field along an arc of radius 2.0cm. A second electron moves at right angles to the field along an arc of radius 3.2cm. What is the energy of the second electron?
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an electron of energy 400 ev moves at right angles to a uniform magnetic field along an arc of radius 20cm a second
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