In Figure 28-33, an electron accelerated from rest through potential difference
1.7 kV enters the gap between two parallel plates having separation 20.0 mm and potential difference
170 V. The lower plate is at the lower potential. Neglect fringing and assume that the electron's velocity vector is perpendicular to the electric field vector between the plates.
Figure 28-33
What uniform magnetic field allows the electron to travel in a straight line in the gap?
T
Now,
(1/2)mV
2 = qV
1
(1/2)(9.11E-31)(V2) = (1.6E-19)(1700)
(4.555E-31)(V2) = 2.72E-16
V2 = (2.72E-16)/ (4.555E-31)
V = (24.44E6) m/s
This is coming back as incorrect. Please work it out so that I can see where I'm going wrong.