Pure Physics Nov 2014_TYS ANSWERS

Nov 2014_Suggested ANSWERS_July 2023 Page 1 of 8 – Nov 2014 Catholic High School | O-Level Physics NOT IN SYLLABUS: 5059 Nov 2014 P1: - Suggested Answers P2: - Paper 1 [40 marks] 1 C 11 B 21 D 31 C 2 B 12 D 22 C 32 B 3 B 13 B 23 D 33 B 4 C 14 C 24 B 34 B 5 A 15 B 25 C 35 D 6 C 16 B 26 A 36 A 7 A 17 A 27 C 37 D 8 B 18 B 28 D 38 D 9 A 19 B 29 A 39 C 10 D 20 A 30 B 40 C *Q. 14: (C) This question required the application of a standard fact to an unfamiliar situation. Some found this difficult. [Note: The pressure of a gas is inversely proportional to its volume. When the tube is held upright: Pair = Patm + PHg. When the tube is held upside down: Pair + PHg = Patm  Pair = Patm - PHg. The reduction in pressure causes the volume of the air to increase, assuming temperature is constant. (B is incorrect: Atmospheric pressure acts equally in all directions.) (D is incorrect: Pressure is exerted equally in all directions.) *Q. 15: (B) This question tested factual knowledge. A significant minority opted for A which incorrectly suggests that a gas has a fixed volume. (A is incorrect.) *Q. 16: (B) [Note: The better insulating materials take a longer time to heat up.] (D is incorrect.) *Q. 20: (A) This question required the application of a standard fact to an unfamiliar situation. Some found this difficult. [Note: Evaporation causes cooling. There is no rise in temperature.] (D is incorrect.) Pair Pair PHg PHg Patm Patm

Nov 2014_Suggested ANSWERS_July 2023 Page 2 of 8 – Nov 2014 *Q. 22: (C) Some found this question challenging. [Note: Determine the angle between the original incident ray and the reflected ray.] (A is incorrect.) *Q. 27: (C) [Note: The current flowing through a solenoid produces a magnetic field, and not an electric field.] (A is incorrect.) *Q. 28 (D) [Note: The two materials must be made of insulators and not conductors. so that they will not lose their excess charges when earthed.] (A is incorrect.) *Q. 32 (B) This question asked about a poorly wired mains plug and the consequence of an error shown in the diagram. Many found this a challenging question. [Note: The live and the neutral wires are both correctly plugged into the mains. The metal case is wrongly connected to the mains , through the live terminal.] (A and D are incorrect.) appliance metal case L N E fuse switch usual, correct situation before plug appliance metal case L N E fuse switch this question before plug

Nov 2014_Suggested ANSWERS_July 2023 Page 3 of 8 – Nov 2014 Paper 2 [80 marks] 1 ai Elastic potential energy 1 aii Gravitational potential energy 1 bi K.E. = ½ mv2 1900 = ½(45)(v2) v = 9.19 m s-1 (3 s.f.) 1 1 bii Not all the elastic potential energy in the spring is transferred to the gymnast as K .E. Some of it is lost as thermal or sound energy in the stretched spring. [Note: Some of it is also transferred to her as