Chapter 20, Problem 41P

* Mass spectrometer A mass spectrometer has a velocity selector that allows ions traveling at only one speed to pass with no deflection through slits at the ends. While moving through the velocity selector, the ions pass through a 60,000-N/C $\stackrel{\to }{E}$ field and a 0.0500-T $\stackrel{\to }{B}$ field. The quantities $\stackrel{\to }{v}$, $\stackrel{\to }{E}$, and $\stackrel{\to }{B}$ are mutually perpendicular. (a) Determine the speed of the ions that are not deflected. (b) After leaving the velocity selector, the ions continue to move in the 0.0500-T magnetic field. Determine the radius of curvature of a singly charged lithium ion, whose mass is $1.16\times {10}^{26}kg$.