28. Magnetic Fields and Forces
Mass Spectrometer
5:03 minutes
Problem 27.58c
Textbook Question
Textbook Question(II) Suppose the electric field between the electric plates in the mass spectrometer of Fig. 27–34 is 2.84 x 10⁴ V/m and the magnetic fields are B = B'= 0.58 T . The source contains carbon isotopes of mass numbers 12, 13, and 14 from a long-dead piece of a tree. (To estimate atomic masses, multiply by 1.67 x 10⁻²⁷ kg .) ((c) Does it matter if the ion charge is positive (lost electrons) or negative (gained electrons)? Explain.
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