A velocity filter with crossed electric and magnetic fields

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A velocity "filter" with crossed electric and magnetic fields is designed to permit the passage of singly ionized 22-Ne atoms (atomic mass=22 unified atomic mass units) of energy 2.0*10^4 eV. The electric field is 3.0*10^5 kg*m/s. What magnetic field is required to hold protons of this momentum?

Reference no: EM13603432

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