Download SP 212 Worksheet Lesson 18: Ch. 28.1, Magnetic Fields

SP 212 Worksheet
Lesson 18: Ch. 28.1, Magnetic Fields
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1) An electron with velocity ~v = (2.9î + 3.8ĵ) × 106 m/s moves through a uniform magnetic field B
(0.029î − 0.20ĵ) T. What is the magnitude of the magnetic force on the electron?
2) Mass spectrometer : An atomic ion has a net charge of magnitude e (it is either +e or −e, you decide).
It is accelerated across a voltage V = 1000 V, then enters a region of uniform magnetic field of magnitude
~ The diameter of the ion’s circular trajectory is
B = 8.00 × 10−2 T. It’s velocity is perpendicular to B.
measured to be 1.6254 m.
a) What is the ion’s kinetic energy after being accelerated?
b) What is the mass of the ion?