Name: Student Number: 1 Student Signature: First Letter of Last Name: PHYSICS 108 Practice Final Exam 2 Hours and 30 Minutes Please spread out so that there is at least one empty seat between you and each of your neighbours. Please place your student ID card on your desk. Closed Book. · Make sure you have all 10 pages of this exam (the first page is this cover-page), plus two-sided inside front cover of textbook and Appendix I (useful math and integrals). . You may use your own 8.5 x 11 inch2 formula sheet as well. · If you continue to answer a question on the back of the exam paper, please indicate so beside that question. · Calculators are permitted. You may use a dictionary if you ask me to check it out first. · Cell phones, laptops, PDAs and electronic communication devices are NOT permitted and must be put away completely and out of sight. · Use any combination you like of pens and pencils. · Multiple choice questions must have one clearly marked answer. · The marking scheme is indicated by each question. Total 100 marks. The exam is 150 minutes long. · There are 8 questions in total; the questions are not of equal difficulty. For the problem questions, part marks will be awarded for partially correct solutions, so for the problem/exercise questions, make your work clear and easy to read, don't skip steps, include brief explanations, draw a diagram if useful. I am extremely generous with part marks (but not for the multiple choice questions!), so for the problem/exercise questions, make your work clear and easy to read, don't skip steps, include brief explanations, and draw a diagram if useful. Academic Conduct/Academic Honesty: No student shall be permitted to enter the examination room after the first half hour, nor will any student be permitted to leave during the first half-hour of the examination. Academic Honesty at UBC: a) Candidates must not make use of any books memoranda, notes, audio or visual devices other than those listed above. b) Speaking or communicating with other candidates during the examination is not permitted c) Purposely exposing your written paper to be viewed by others is not permitted. (for markers use only) Question 1 2 3 4 5 6 7 Mark
2 Name: Question 1. 26 marks Multiple choice. Please circle your answer. Each part is 2 marks. A. The core of a transformer is typically laminated to: a. make it easy to assemble b. reduce the resistance of transformer c. increase the magnetic flux d. prevent eddy currents e. reduce the cost of making the transformer B. According to Gauss' Law for magnetism, magnetic field lines: a. begin at south poles and end at north poles b. begin at north poles and end at south poles c. start at both north poles and south poles and end at infinity. d. form closed loops e. cannot exist C. A displacement current exists wherever there is: a. a magnetic field