A proton, that is accelerated from rest through a potential of
60 kV enters the velocity filter, consisting of a
parallel-plate capacitor and a magnetic field, shown below. What is
the proton's speed? Take mp=1.67×10−27mp=1.67×10-27 kg
and e=1.6×10−19e=1.6×10-19 C.
The speed, v =
The E-field between the plates is 4.7×1064.7×106 N/C.
What B-field is required so that the protons are not deflected?
The magnetic field, B =
E x P B (x
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