Question

A. What is the electric field strength between the disks? Two significant figures and include the proper units

B. A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the postitive disk? Two significant figures and include the proper units

Two temama charged to 1 2 They What is the old song on the Express your answer to two significatures and include the propriate units IRROR? E. Value Units Submit est Express your answer to two significant and include e propriate si I! + O ? Value Units

Answer 1

g 2 = charge on each plate = 13*16=95 A E Area of disk E TEE A) Electric de distance between field (E) between plates plates = E= 2. = 2.9 X 10-3 m A E DE diameter of plate =) E = 2 =107x10-2m T ?& se gradius of plates = 13x10-9 =B=0.85 216?m Tx (0.85 X153)2 x8.85 x 15 12 = 13*1.-9 13x169 * *0.7225 x16" X 8.15 X1.12 20.0877xiók = 13 x 10? 67 x 10 = 6.5 X10CNIC 30.0877 20.08771 me mass of proton = 1.67 X105 kg 2= charge on beraton = 1.6 X 10-10 C VE speed of braton at are plate By using work energy theorem : work done by electric field = change in Kinetic energy -q de = Final Kinetic energy - Initial Kinetic energy -) -q de = 0-5mx2 =) 2dE = mv2 T: work is done by external force, so work done by - E is negative and finally state proton comes to rest =) V=0 =) final Kinetic energy co] -) V2 = 22 de 122 de m v m -) V = [2 x 1.6 X10-16x 2.9x10=3x6.5X10€ 3.612 * Jol2 = 1.9 x 16 1.67 x 10-27