hapter 15 (1I) Begin Date: D23 2UT8 TL (8%) Problem 3: Consider a proton in a un

Question

hapter 15 (1I) Begin Date: D23 2UT8 TL (8%) Problem 3: Consider a proton in a uniform electric field directed left to nght. as shown in the figure. For both paths the initial speed of the proton is the same, but the direction of the initial velocity is different Ctheexpertt 50% Part (a) Compared the change in electric potential energy along path A to the change in electric potential energy along path IB Grade Summa Deductions Potential OThere is not enough information given -we need either the initial speed or the size of the electric field Artempts reman per attern detailed view Hint I give up Hints: 4%, deluction per hit. Hints rernaaning: Feedback: 5% deduction per feedback. 50% Part (b) Compare the speed of the proton at the end of path A with the speed at the end ofpath B.

Explanation / Answer

The potential energy change is :

V = - int E.dX

Since, E is constant,

V = - E(final positon - initial position)

So, Ua > Ub

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