A beam of electrons is accelerated from rest through a potential difference of 2 kV and passes between the plates of area 30 cm? and separation 9 mm as shown in the figure. If there is 2 mT perpendicular magnetic field at the region of plates directed out of the page, a) What must be the polarities of a and b so that electrons pass between the plates undeflected? b) By assuming that the plates form a parallel plate capacitor, calculate total charge of the plates? a

College Physics
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Chapter1: Units, Trigonometry. And Vectors
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A beam of electrons is accelerated from rest through a
potential difference of 2 kV and passes between the plates of
area 30 cm? and separation 9 mm as shown in the figure. If there
is 2 mT perpendicular magnetic field at the region of plates
directed out of the page,
a) What must be the polarities of a and b so that electrons pass
between the plates undeflected?
b) By assuming that the plates form a parallel plate capacitor,
calculate total charge of the plates?
a
Transcribed Image Text:A beam of electrons is accelerated from rest through a potential difference of 2 kV and passes between the plates of area 30 cm? and separation 9 mm as shown in the figure. If there is 2 mT perpendicular magnetic field at the region of plates directed out of the page, a) What must be the polarities of a and b so that electrons pass between the plates undeflected? b) By assuming that the plates form a parallel plate capacitor, calculate total charge of the plates? a
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