1. A proton is released from rest in a uniform electric field that has a magnitu
ID: 1460294 • Letter: 1
Question
1. A proton is released from rest in a uniform electric field that has a magnitude of 6.8 x 10^4 V/m. The proton undergoes a displacement of 0.35 m in the direction of the electric field. (a) Find the change in electric potential between points A and B. (10 pts) (b) Find the change in potential energy of the proton-field system for this displacement (10 pts) 2. A ring of radius 0.06 m has a uniform charge of 12.0 nC. The ring is oriented with its plane perpendicular to the x-axis, as shown. A small particle with mass equal 5 x 10^-6 kg and charge 3.0 nC is released at point x = 0.02 m away from the center. Find the speed of particle at a great distance from the ring. Assume the effects due to gravity are negligible. (10 pts)Explanation / Answer
a) change in electric potential = Ed
= 6.8*10^4 *0.35 = 2.38*10^4 V
b)Change in potential Energy = qV
= (1.6*10^-19) * 2.38*10^4
= 3.808*10^-15 J
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