28. Magnetic Fields and Forces
Mass Spectrometer
5:55 minutes
Problem 27.57
Textbook Question
Textbook Question(II) One form of mass spectrometer accelerates ions by a voltage V before they enter a magnetic field B. The ions are assumed to start from rest. Show that the mass of an ion is m = qB²R²/2V , where R is the radius of the ions’ path in the magnetic field and q is their charge.
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