ipho96pract - PART 5 Experimental Competition Exam...

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141 PART 5 Experimental Competition Exam commission page 142 Problems in English page 143 The men behind the equipment page 153 Model answers in English page 154 Marking form (translated to English) page 165 The last preparations (photos) page 171 Examples of translated texts page 172 Examples of student’s papers page 181 Photos from the experim. competition page 190
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142 Preparation of the experimental competition was carried out by: Børge Holme Tom Henning Johansen Arnt Inge Vistnes Commission for the Experimental Competition: Tom Henning Johansen Børge Holme Svenn L. Andersen Carl Angell Bjørn Berre # Jan Kåre Bording Magne Guttormsen Vidar Hansen Tor Haugset Geir Helgesen § Jan Holtet Randi Haakenaasen Trond Myklebust Jon Samset § from University of Oslo, Oslo § : Institute for Energy Technology, Kjeller # : Agricultural University of Norway, Ås Photo: Geir Holm
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143 27 th INTERNATIONAL PHYSICS OLYMPIAD OSLO, NORWAY EXPERIMENTAL COMPETITION JULY 4 1996 Time available: 5 hours READ THIS FIRST : 1. Use only the pen provided. 2. Use only the marked side of the paper. 3. No points will be given for error estimates except in 2c. However, it is ex- pected that the correct number of significant figures are given. 4. When answering problems, use as little text as possible. You get full credit for an answer in the form of a numerical value, a drawing, or a graph with the proper definition of axes, etc. 5. Write on top of every sheet in your report: Your candidate number (IPhO ID number) The section number The number of the sheet 6. Write on the front page the total number of sheets in your report, including graphs, drawings etc. 7. Ensure to include in your report the last page in this set used for answering section 2a and 3b, as well as all graphs requested. SAFETY HAZARD: Be careful with the two vertical blades on the large stand. The blades are sharp! This set of problems consists of 10 pages.
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144 SUMMARY The set of problems will cover a number of topics in physics. First, some me- chanical properties of a physical pendulum will be explored, and you should be able to determine the acceleration of gravity. Then, magnetic forces are added to the pendulum. In this part the magnetic field from a permanent magnet is measured using an electronic sensor. The magnetic moment of a small perma- nent magnet will be determined. In addition, a question in optics in relation to the experimental setup will be asked. INSTRUMENTATION The following equipment is available (see Figure 1): A Large aluminium stand B Threaded brass rod with a tiny magnet in one end (painted white) (iron in the other). C 2 Nuts with a reflecting surface on one side D Oscillation period timer (clock) with digital display E Magnetic field (Hall) probe, attached to the large stand F 9 V battery G Multimeter, Fluke model 75 H 2 Leads I Battery connector J Cylindrical stand made of PVC (grey plastic material) K Threaded rod with a piece of PVC and a magnet on the top L Small PVC cylinder of length 25.0 mm (to be used as a spacer) M Ruler
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This note was uploaded on 11/08/2011 for the course PHYS 0000 taught by Professor Na during the Spring '11 term at Rensselaer Polytechnic Institute.

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ipho96pract - PART 5 Experimental Competition Exam...

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