A velocity selector is used in accelerator mass spectrometry to select particles

Question

A velocity selector is used in accelerator mass spectrometry to select particles based on their speed. The velocity selector is composed of electric and magnetic fields, such that particles with the correct charge to mass ratio and speed will be unaffected, and other particles will be deflected. Choose the correct Statement regarding this velocity selector: faster moving positively charged particles will be deflected upwards. the E-Field and the B-Field must be in opposite directions. particles with lesser charge will be deflected downwards. particles with lesser charge will be deflected upwards. faster moving positively charged particles will be deflected downwards.

Explanation / Answer

option a
faster moving positively charged particles will be deflected upward because the total force acting on the direction of an electric field by Lorentz force

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