Question

The figure shows an electron entering a parallel-plate capacitor with a speed of 5.65×106 . The electric field of the capacitor has deflected the electron downward by a distance of 0.618 at the point where the electron exits the capacitor.
The first thing you should learn about physics is that you have to provide the dimensions along with the numbers when computing physical quantities. Physics is not just arithmetic.

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An electron is launched at a 45∘ angle and a speed of 5.0×106m/s from the positive plate of the parallel-plate capacitor shown in the figure (Figure 1) . The electron lands 4.0 cm away.
Part A
What is the electric field strength inside the capacitor?
3550 N/C

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