Look up the formula for the 'Larmor' or 'cyclotron' radius of a particle in a magnetic field. It depends upon q, v and B.
It will let you solve for B.
If you can't find it in your textbook or derive it (which isn't hard), do a Google search. It will be a useful learning experience.
For a singly ionized molecule, q = e.
Hint: q V B = M V^2/R
In the operating
Room, anesthesiologists use mass spectrometers to monitor the respiratory gases of patients
undergoing surgery. One gas that is often monitored is the anesthetic isoflourane (molecular
mass = 3.06 · 10−25 kg). In a spectrometer, a singly ionized molecule of isoflourane (charge =
+e) moves at a speed of 7.2 · 103 m/s on a circular path that has a radius of 0.10 meters. What
is the magnitude of the magnetic field that the spectrometer uses?
1 answer
1 answer