An electron is accelerated from rest at the negative plate of a capacitor to the positive one, where a small hole allows the electron to pass through. The cap

  

An electron is accelerated from rest at the negative plate of a capacitor to the positive one, where a small hole allows the electron to pass through. The capacitor is charged to 12 V.

(a) How fast would the electron exit the capacitor? (3 Marks)

(b) If the final speed of the electron is equal to the initial speed of a proton at the negative plate moving towards the positive plate, does the proton make it across? Justify your answer. (2 Marks)

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