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Direction : (1-5)

Mass Spectrometer

Various methods can be used to measure the mass of an atom. One possibility is through the use of a mass spectrometer.

The basic feature of a Banrbidge mass spectrometer is illustrated in figure. A particle carrying a charge +q is first sent through a velocity selector and comes out with velocity v = E/B.

The applied electric and magnetic field satisfy the relation E = vB so that the trajectory of the particle is a straight line.

Upon entering a regin where a second magnetic field \[{{\overrightarrow{B}}_{0}}\] pointing into the page has been applied, the particle will move in a circular path with radius r and eventually strike the photographic plate.

In mass spectrometer, the ions are sorted out in which of the following ways?

A) By accelerating them through electric field

B) By accelerating them through magnetic field

C) By accelerating them through electric and magnetic field

D) By applying a high voltage.