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GCE JAN 2011 : AS 1Forces, Energy and Electricity - Revised

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Centre Number 71 Candidate Number ADVANCED SUBSIDIARY General Certificate of Education January 2011 Physics assessing Module 1: Forces, Energy and Electricity AY111 Assessment Unit AS 1 [AY111] WEDNESDAY 12 JANUARY, MORNING TIME 1 hour 30 minutes. INSTRUCTIONS TO CANDIDATES Write your Centre Number and Candidate Number in the spaces provided at the top of this page. Answer all questions. Write your answers in the spaces provided in this question paper. INFORMATION FOR CANDIDATES The total mark for this paper is 75. Quality of written communication will be assessed in question 9. Figures in brackets printed down the right-hand side of pages indicate the marks awarded to each question. Your attention is drawn to the Data and Formulae Sheet which is inside this question paper. You may use an electronic calculator. For Examiner s use only Question Marks Number 1 2 3 4 5 6 7 8 111604 9 6456 10 Total Marks If you need the values of physical constants to answer any questions in this paper they may be found in the Data and Formulae sheet. Examiner Only Marks Remark Answer all ten questions. 1 (a) (i) What is a scalar quantity? _________________________________________________________ _________________________________________________________ (ii) What is a vector quantity? _________________________________________________________ _______________________________________________________ [2] (b) Six physical quantities are listed below. Indicate which of the physical quantities are vectors by placing a tick ( ) in the box corresponding to the quantity. Potential energy Frequency Velocity Charge Force Power 6456 [2] 2 [Turn over (c) Fig. 1.1 shows a force of 12 N acting on a brick resting on a horizontal surface. Examiner Only Marks Remark 12 N 35 Horizontal surface Fig. 1.1 (i) Find by calculation the horizontal and vertical components of this force. Horizontal component = ________________ N Vertical component = ________________ N [2] (ii) What is the resultant vertical force acting on the horizontal surface if the brick has mass 3.0 kg? Force = ________________ N 6456 [2] 3 [Turn over 2 (a) A catapult is used to project a ball vertically upwards with an initial velocity of 5.0 m s 1. Examiner Only Marks Remark (i) Calculate the maximum height reached by the ball. Maximum height = ________________ m [2] (ii) Calculate the total flight time (from launch until it returns to the starting point). Flight time = ________________ s 6456 [2] 4 [Turn over (b) Fig. 2.1 is a simplified sketch graph of velocity v against time t for a car travelling along a straight road between two sets of traffic lights. Examiner Only Marks Remark v 0 0 t1 t2 t3 t4 t Fig. 2.1 (i) Describe in words how the acceleration of the car varies in the following time intervals from t1 to t4. From t1 to t2: _____________________________________________ From t2 to t3: _____________________________________________ From t3 to t4: ___________________________________________ [2] (ii) State how the distance between the traffic lights could be deduced from Fig. 2.1. _________________________________________________________ _______________________________________________________ [2] 6456 5 [Turn over 3 (a) State Newton s second law of motion. Examiner Only Marks Remark _____________________________________________________________ _____________________________________________________________ ___________________________________________________________ [2] (b) A person, of mass 55.0 kg, stands on bathroom scales in a lift. The scales are calibrated to measure in newtons. (i) The lift starts to ascend vertically upwards with constant acceleration of 1.5 m s 2. Calculate the scale reading while the lift is accelerating upwards. Reading = ________________ N [2] (ii) After this initial acceleration the lift continues to travel upwards at constant speed. Determine the scale reading in this case. Reading = ________________ N [1] (iii) The lift then starts to slow down with constant retardation of 1.0 m s 2. Calculate the scale reading while the lift is slowing down. Reading = ________________ N 6456 [2] 6 [Turn over 4 Fig. 4.1 shows a uniform plank, of weight 30 N and length 3 m, resting on two supports. The supports are 0.5 m and 2.0 m from the left hand end of the plank. A weight of 18 N is suspended from the left hand end of the plank. X Examiner Only Marks Remark Y Fig. 4.1 (a) Find the reactions, X and Y, at the two supports. X = ________________ N Y = ________________ N [3] (b) By how much should the weight on the left hand end be increased so that the reaction Y becomes zero? Increase in weight = ________________ N 6456 7 [2] [Turn over 5 A small car has a mass of 800 kg and can accelerate from rest to a velocity of 27.8 m s 1 in 13.5 seconds. Examiner Only Marks Remark (a) (i) Calculate the kinetic energy of the car when moving at 27.8 m s 1. Kinetic energy = ________________ J [1] (ii) Calculate the useful power output of the engine to produce this acceleration. Power output = ________________ W [1] (iii) The efficiency of the engine in converting chemical energy to useful kinetic energy is 29%. Calculate the chemical energy from the petrol needed to produce this amount of kinetic energy. Chemical energy = ________________ J 6456 8 [2] [Turn over (b) The car, travelling at 27.8 m s 1, reaches the bottom of the slope as shown in Fig 5.1. The driver switches off the engine and allows the car to free wheel up the slope. Ignoring friction, calculate how far the car travels along the slope before coming to rest. Examiner Only Marks Remark 8 Fig. 5.1 Distance up the slope = ________________ m 6456 9 [3] [Turn over 6 (a) (i) Draw and label an experimental arrangement which could be used to measure the Young modulus of the material of a long wire. Examiner Only Marks Remark [3] (ii) Apart from measuring the force on the wire, there are three other quantities to be measured when determining the Young modulus. In the table below list the other measurements you would make, and state the instruments you would use to make the measurements. Measurement Instrument [3] 6456 10 [Turn over (b) A stretching force of 5.5 N is applied to a copper wire of length 2.5 m, producing a strain of 7.8 10 4. The Young Modulus of copper is 1.2 1011 N m 2. Examiner Only Marks Remark (i) Calculate the extension produced in the wire. Extension = ________________ mm [1] (ii) Calculate the cross-sectional area of the wire. Cross-sectional area = ________________ mm2 6456 11 [3] [Turn over 7 (a) Name one example of an ohmic conductor. Examiner Only Marks Remark _____________________________________________________________ On Fig. 7.1, sketch a graph to illustrate how the current through the conductor you have named varies with the potential difference across it. Assume the temperature of the conductor remains constant. 0 [2] V 0 Fig. 7.1 (b) (i) Explain what is meant by superconductivity. On Fig. 7.2 sketch a graph to illustrate this effect for a wire made of a superconducting material, both below and above the superconducting transition temperature. Label the transition temperature Ts. _________________________________________________________ _________________________________________________________ R 0 0 T [3] Fig. 7.2 6456 12 [Turn over (ii) State one application of superconductivity. Examiner Only Marks Remark _________________________________________________________ _________________________________________________________ _______________________________________________________ [1] 6456 13 [Turn over 8 A current of 60 mA flows through a resistor of resistance 80 W for 12 minutes. Examiner Only Marks Remark (a) (i) Calculate the amount of charge which passes through the resistor in this time. Charge = ________________ C [1] (ii) Hence calculate the number of electrons which pass through the resistor in this time. Number of electrons = ________________ [1] (b) (i) Calculate the potential difference across the resistor. Potential difference = ________________ V [1] (ii) Calculate the heat energy dissipated by the resistor in 12 minutes. Energy = ________________ J 6456 [2] 14 [Turn over bLANK PAGE (Questions continue overleaf) 6456 15 [Turn over In this question you should answer in continuous prose where appropriate. you will be assessed on the quality of your written communication. 9 Examiner Only Marks Remark (a) Describe an experiment to determine the internal resistance of a battery. Include a circuit diagram. Circuit diagram [2] Description of experiment: _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ ___________________________________________________________ [2] 6456 16 [Turn over (b) (i) Internal resistance can be obtained graphically. Label the axes of Fig 9.1 to enable internal resistance to be determined. Sketch a graph of the results obtained from such an experiment. 0 Examiner Only Marks Remark 0 Fig. 9.1 (ii) How is the internal resistance obtained from your graph? _________________________________________________________ _______________________________________________________ [3] Quality of written communication [2] (c) A car battery has e.m.f 12.6 V and internal resistance 0.02 W. When the starter motor is connected to the battery, the battery delivers a current of 145 A. Calculate the terminal potential difference when the starter is connected. Terminal potential difference = ________________ V 6456 17 [2] [Turn over 10 Fig. 10.1 depicts two fixed resistors and a variable resistor connected in series to an 18 V power supply of negligible internal resistance. The arrangement can be used to give a variable output voltage between C and D. Examiner Only Marks Remark 240 A 18 V C 120 B 360 D Fig. 10.1 (i) Calculate the current flowing round the circuit. Current = ________________ mA [2] (ii) Hence calculate the potential difference across the 120 W variable resistor (the voltage between A and b). Potential difference = ________________ V 6456 18 [1] [Turn over (iii) Calculate the potential difference between the point D and the slider contact of the variable resistor (labelled C), when it is mid-way between A and b. Potential difference = ________________ V Examiner Only Marks Remark [2] (iv) A 210 W resistor is now placed across the output between C and D. Calculate the new potential difference between C and D. Potential difference = ________________ V [3] THIS IS THE END OF THE QUESTION PAPER 6456 19 [Turn over Permission to reproduce all copyright material has been applied for. In some cases, efforts to contact copyright holders may have been unsuccessful and CCEA will be happy to rectify any omissions of acknowledgement in future if notified. 111604 GCE (AS) Physics Data and Formulae Sheet Values of constants speed of light in a vacuum c = 3.00 108 m s 1 elementary charge e = 1.60 10 19 C the Planck constant h = 6.63 10 34 J s mass of electron me = 9.11 10 31 kg mass of proton mp = 1.67 10 27 kg acceleration of free fall on the Earth s surface g = 9.81 m s 2 electron volt 1 eV = 1.60 10 19 J Useful formulae The following equations may be useful in answering some of the questions in the examination: Mechanics Conservation of energy 1 mv 2 1 mu 2 = Fs 2 2 Hooke s Law F = kx (spring constant k) Sound intensity level/dB = 10 lg10 Two-source interference = for a constant force Sound Waves I I0 ay d Light Lens formula Magnification 111 += uvf v m = u Electricity Terminal potential difference Potential divider V = E Ir (E.m.f. E; Internal Resistance r) RV Vout = 1 in R1 + R2 Particles and photons de Broglie equation = h p AY111INS 6456.02 111605

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Additional Info : Gce Physics January 2011 Assessment Unit AS 1, Module 1: Forces, Energy and Electricity - Revised
Tags : General Certificate of Education, A Level and AS Level, uk, council for the curriculum examinations and assessment, gce exam papers, gce a level and as level exam papers , gce past questions and answer, gce past question papers, ccea gce past papers, gce ccea past papers

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