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Question 2


A uniform electric field exists in the region between two oppositely charged parallel plates 1.68 cm apart. A proton is released from rest at the surface of the positively charged plate and strikes the surface of the opposite plate in a time interval 1.60×10^−6 s.


Part A: Find the magnitude of the electric field. Use 1.60×10^−19 C for the magnitude of the charge on an electron and 1.67×10^−27 kg for the mass of a proton.


Part B: Find the speed of the proton at the moment it strikes the negatively charged plate.

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