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Tushar Watts Grade:
        

An electron is shot at an initial speed of V0  m/s, at an angle theta  from the x-axis. It moves through a uniform electric field E j^ . A screen for detecting electrons is positioned parallel to the y-axis , ata a distance x'. What is the velocity of the electron when it hits the screen.?


7 years ago

Answers : (1)

Pratham Ashish
17 Points
										

hi,


x component of velocity = V0 cos θ


accleration in x direction is zer0


x component of velocity after tsec , v1x =  V0 cos θ , 


& time taken to reach the sc reen ,t =  x'/ V0 cos θ


vertical component of velocity = V0 sin θ  & accl. = -eE /m


    vertical velocity at time  t  ,  v1y  =   V0 sin θ  -  eE /m  * x'/ V0 cos θ


                                                    =   V0 sin θ  -  eE  x'/ mV0 cos θ 


velocity after time t ,v1  = √ v1x^2  + v1y ^2


                                   =  √   {  V0 cos θ)^2  + ( V0 sin θ  -  eE  x'/ mV0 cos θ  )^2 }

7 years ago
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