nakedkats7656
24.04.2020 •
Physics
A proton of mass is released from rest just above the lower plate and reaches the top plate with speed . An electron of mass is released from rest just below the upper plate. Calculate the speed of the electron when it reaches the bottom plate, in terms of , , , and physical constants, as appropriate. Ignore gravitational effects.
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Ответ:
v = √ 2e (V₂-V₁) / m
Explanation:
For this exercise we can use the conservation of the energy of the electron
At the highest point. Resting on the top plate
Em₀ = U = -e V₁
At the lowest point. Just before touching the bottom plate
Emf = K + U = ½ m v² - e V₂
Energy is conserved
Em₀ = Emf
-eV₁ = ½ m v² - e V₂
v = √ 2e (V₂-V₁) / m
Where e is the charge of the electron, V₂-V₁ is the potential difference applied to the capacitor and m is the mass of the electron
Ответ:
5
Explanation: