(8) 5.00x103 N/C 38.90 clockwise from the positive x-axis 6.65x103 N/C, 38.9° cl
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(8) 5.00x103 N/C 38.90 clockwise from the positive x-axis 6.65x103 N/C, 38.9° clockwise from the positive x-axis 5.00x103 N/C, 19.4° clockwise from the positive x axis O 6.65x103 N/C, 19.4° counter-clockwise from the positive x axis Question 3 A parallel plate capacitor is formed from two circular plates, each of radius 2.80 cm, separated by 3.00 mm. The plates are charged to 6.10 A proton is shot from the negative plate to the positive. What launch speed must the proton have to just barely reach the positive plate? 4.01x105 m/s 8.04x106 m/s O 1.61x107 m/s 2.84x 105 m/s Click "Submit Answer" below to submit all 3 of your answers. Submit Answer Tries 2/10 Previous Tries Post Discussion Search Windows DOExplanation / Answer
a) The eletric field is:
charge density / epsilon = 6.1 x 10^-9 / 4 x pi x .0028^2 / 8.854 x 10^-9
= 6.7 e4 V/m
F = qE = ma
So, acceleration = qE/m = 6.69 x 10^12 m/sec
Distance = .003 m = v^2 /2a
v = 2.00 x 10^5 m/sec
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