$1.($a$)$ An electron starts at rest and accelerates through an electric field$$ established by a set of parallel plates with a potential difference of $35$ V$.$ What is the speed of the electron the instant before it hits the negative plate?

$($e $=1\mathrm{.}610-19$ C$,$ melectron $=9\mathrm{.}110-31$ kg$)(/6)$

V$=3\mathrm{.}5110$ to the power of $6$ m$/$s

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$($b$)$ Instead of hitting the negative plate, the electron, travelling East, escapes the parallel plates through a small hole and enters a magnetic field of $0\mathrm{.}75$ T directed downward. What will be the magnetic force $($magnitude and direction$)$ on the charge? F$=4\mathrm{.}211013$N

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$($c$)$ Once the electron has entered the magnetic field, it is in circular motion. What is the radius of the electron$$s circular path? r$=2\mathrm{.}66105$m