2/23/2014 HW 4http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448417 1/11Current Score : 35 / 35 Due : Tuesday, February 11 2014 02:30 PM EST1. 1/1 points | Previous Answers SerPSE8 25.OQ.005.Rank the potential energies of the four systems of particles shown in the figure below from largestto smallest. Include equalities if appropriate. (Use only ">" or "=" symbols. Do not include anyparentheses around the letters or symbols.)a>b=d>c a>b=d>c or a>d=b>c HW 4 (Homework)Tyler Bogard125112:40, Spring 2014Instructor: Sharvil DesaiWebAssignThe due date for this assignment is past. Your work can be viewed below, but no changes can be made.2/23/2014 HW 4http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448417 2/112. 2/2 points | Previous Answers SerPSE8 25.OQ.006.In a certain region of space, a uniform electric field is in the x direction. A particle with negativecharge is carried from x = 20.0 cm to x = 60.0 cm.(i) Does the electric potential energy of the charge–field increase, remain constant,decrease, or change unpredictably?(ii) Has the particle moved to a position where the electric potential is higher than before,unchanged, lower than before, or unpredictable? It increases.It remains constant. It decreases.It changes unpredictably.The potential is higher than before.The potential is unchanged. The potential is lower than before.The change in potential is unpredictable.2/23/2014 HW 4http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448417 3/113. 1/1 points | Previous Answers SerPSE8 25.QQ.001.In the figure below, two points A and B are located within a region in which there is an electricfield. The potential difference ΔV = VB  VA is negative negative . 2/23/2014 HW 4http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448417 4/114. 5/5 points | Previous AnswersThe figure below represents a graph of the electric potential in a region of space versus positionx, where the electric field is parallel to the x axis. Each vertical division on the graph is equal to10 volts.(a) What is the electric field at x = 0.5 cm? Positive values represent electric fields in the+x direction. 2000 2000 V/m (b) What is the electric field at x = 2.5 cm? 0 0 V/m (c) What is the electric field at x = 3.5 cm? 2000 2000 V/mNow consider the figure to represent the electric field instead of potential, with each verticaldivision on the graph equal to 20 N/C.(d) What is the potential difference V2V3, the difference in potential between x = 2 cmand x = 3 cm? .4 0.4 V (e) What is the potential difference V4V1? 1 1 V2/23/2014 HW 4http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448417 5/115. 4/4 points | Previous AnswersThe figure below shows several equipotential lines each labeled by its potential in volts. Thedistance between the lines of the square grid represents 1.50 cm.(a) Is the magnitude of the field greater at A or at B? (b) What is at B?133.3 133 N/C down down (c*) Is the potential greater at A or at B? EA < EB EA > EB EA = EBVA < VB VA = VB VA > VB2/23/2014 HW 4http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448417 6/116. 3/3 points | Previous Answers SerPSE8 25.P.019.A charge +q is at the origin. A charge 2q is at x = 4.70 m on the +x axis.(a) For what finite value of x is the electric field zero? 11.34 11.3 m (b) For what finite values of x is the electric potential zero? (Note: Assume a referencelevel of potential V = 0 at r = ∞.)Smallest value of x:4.7 4.7 mLargest value of x:1.56 1.57 m 7. 1/1 points | Previous AnswersHow much work must you do to move an electron from A to B? The rectangle is 12.3 cm high and22.5 cm wide. Remember that negative work means that we can get work out of the process. 7.96E17 7.96e17 J2/23/2014 HW 4http://www.webassign.net/web/Student/Assignment-Responses/last?dep=8448417 7/118. 1/1 points | Previous Answers SerPSE8 25.P.031.In 1911, Ernest Rutherford and his assistants Geiger and Marsden conducted an experiment inwhich they scattered alpha particles (nuclei of helium atoms) from thin sheets of gold. An alphaparticle, having charge +2e and mass 6.64 1027 kg, is a product of certain radioactive decays.The results of the experiment led Rutherford to the idea that most of an atom's mass is in a verysmall nucleus, with electrons in orbit around it. Assume an alpha particle, initially very far from astationary gold nucleus, is fired with a velocity of 2.27 107 m/s directly toward the nucleus(charge +79e). What is the smallest distance between the alpha particle and the nucleus beforethe alpha particle reverses direction? Assume the gold nucleus remains stationary.21.3 21.3 fm 9. 1/1 points | Previous Answers