Pearson Edexcel Level 3 GCE Physics - WordPress

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Write your name hereSurnameOther namesPearson EdexcelLevel 3 GCECentre NumberCandidate NumberPhysicsAdvanced SubsidiaryPaper 2: Core Physics IIThursday 8 June 2017 – AfternoonTime: 1 hour 30 minutesYou must have:RulerPaper Reference8PH0/02Total MarksInstructionsUse black ink or ball-point pen. Fillboxes at the top of this page with your name, centrein thenumber and candidate number.Answerin Sections A and B. Answer allthequestionsin the spaces provided – there may bequestionsmore space than you need.Informationtotal mark for this paper is 80. TheT hefor each question are shown in brackets – usemarksthis as a guide as to how much time to spend on each question.may use a scientific calculator. Youmarked with an asterisk (*), marks will be awarded for your ability to In questionsstructure your answer logically showing how the points that you make arerelated or follow on from each other where appropriate.Adviceeach question carefully before you start to answer it. Readto answer every question. TryCheckanswers if you have time at the end. You areyouradvised to show your working in calculations including units where appropriate.P49875A 2017 Pearson Education Ltd.1/1/1/1/*P49875A0128*Turn over

All multiple choice questions must be answered with a cross in the box for thecorrect answer from A to D. If you change your mind about an answer, put a lineand then mark your new answer with a cross .through the boxA spring is hung vertically and masses are added to the lower end.The graph shows how the extension Δx of the spring varies with the mass m added.ΔxmBmgΔxC1mgΔx2Dmg2Δx2(Total for Question 1 1 mark)The velocity of a wave on a string is given by v string and μ is a constant.DO NOT WRITE IN THIS AREAA mgΔxDO NOT WRITE IN THIS AREAThe work done in extending the spring can be expressed asDO NOT WRITE IN THIS AREA0DO NOT WRITE IN THIS AREA1DO NOT WRITE IN THIS AREAAnswer ALL questions.DO NOT WRITE IN THIS AREASECTION ATwhere T is the tension in theµWhich of the following pairs of variables, if plotted, would produce a straight line graph?x-axisy-axisATvBvTC1vTDTv(Total for Question 2 1 mark)2*P49875A0228*

DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA3In an experiment to determine the wavelength of light, a diffraction grating is illuminatedwith light from a monochromatic source. A series of bright spots is observed.The experiment is repeated and the distance between consecutive bright spots increases.Select the row of the table that gives two changes to the experimental set up which wouldboth cause the distance between consecutive bright spots to increase.Number of slits per mm in thediffraction gratingWavelength of the light asedIncreasedDDecreasedDecreasedDO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA(Total for Question 3 1 mark)4Displacement-time graphs are shown for two waves, each of frequency f and period T.displacementtimetDO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAThe phase difference in radians between the two waves is given byA2πtTBπtTC2πtfDπtf(Total for Question 4 1 mark)*P49875A0328*3Turn over

The diagram shows the lowest energy levels for a certain atom.–1.6 eV2–2.3 eV1–3.2 eVground state–5.5 eVA photon with energy 3.2 eV is absorbed.DO NOT WRITE IN THIS AREA3DO NOT WRITE IN THIS AREA5An electron could move fromA ground state to level 1.6The rate at which energy is transferred to a solar cell of radius r is P.In the same conditions, the rate at which energy is transferred to a solar cell of radius 2r is given byAP4BP2DO NOT WRITE IN THIS AREA(Total for Question 5 1 mark)DO NOT WRITE IN THIS AREAD level 2 to ground state.DO NOT WRITE IN THIS AREAC level 1 to ground state.DO NOT WRITE IN THIS AREAB ground state to level 2.C 2PD 4P(Total for Question 6 1 mark)4*P49875A0428*

DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA7For two waves of light to be coherent the waves mustA always have a phase difference equal to 0.B oscillate in the same plane.C have a similar amplitude.D originate from one source.(Total for Question 7 1 mark)8Prenatal ultrasound scans are performed to produce an image of a fetus.The ultrasound wave is transmitted in pulses so thatA exposure of the patient to ultrasound radiation is reduced.B smaller distances can be measured.C the reflected pulse can be detected before the next pulse is transmitted.D there is less diffraction.(Total for Question 8 1 mark)9In the 1920s Louis de Broglie proposed that an electron could behave as a wave.DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREACalculate the wavelength of an electron that is travelling at a speed of 2.2 107 ms–1.(3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Wavelength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(Total for Question 9 3 marks)*P49875A0528*5Turn over

(a) The receiver and transmitter are initially set up, as shown in the diagram, so that amaximum audible output is produced.direction ofreceiverrotationDO NOT WRITE IN THIS AREATransmitter supplies a 10 GHz polarised EM wave.Receiver detects EM waves in a single plane containing the direction of propagation,producing an audible output proportional to the microwave intensity.DO NOT WRITE IN THIS AREA10 Details supplied with a school microwave transmitter and receiver include the followinginformation:Describe what is heard as the receiver is rotated.(2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAThe receiver is rotated through 180 relative to the transmitter.DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAtransmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6*P49875A0628*

DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA(b) A student uses the microwave transmitter and receiver to investigate interferenceusing the set-up shown.transmitterreceivermetal platesAs the receiver is moved along the dotted line, alternate points of maximum andminimum intensity are detected.Explain why points of maximum and minimum intensity are detected.(4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(Total for Question 10 6 marks)*P49875A0728*7Turn over

DO NOT WRITE IN THIS AREA(a) The diagram shows three parallel rays of light incident on a diverging lens and thepath of the rays after passing through the lens. The diagram is drawn to actual size.Add to the diagram to determine the focal length of the lens.DO NOT WRITE IN THIS AREA11 Converging and diverging lenses may be used in glasses to correct problems with eyesight.(2)25 cm2.4 cmDiagram notto scaleDO NOT WRITE IN THIS AREAThe diagram shows light rays from an object 25 cm in front of an eye converging to apoint on the retina at the back of the eye. The eye has a depth of 2.4 cm.DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA(b) The eye acts as a converging lens system.DO NOT WRITE IN THIS AREAFocal length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .retinafront of eyeCalculate the optical power of the eye.(3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8*P49875A0828*

DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA(c) A person who is long-sighted cannot clearly see objects that are close to the eye.Rays of light from an object 25 cm in front of the eye would converge to a pointbehind the retina as shown in the diagram.Diagram notto scale25 cmretinaDO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAfront of eyeThis may be corrected by using an additional converging lens.State how an additional converging lens would enable the light rays from an object25 cm in front of the eye to converge at a point on the retina.(1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(Total for Question 11 6 marks)*P49875A0928*9Turn over

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10*P49875A01028*DO NOT WRITE IN THIS AREA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DO NOT WRITE IN THIS AREA(1)DO NOT WRITE IN THIS AREA(a) State what is meant by a virtual image.DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAThe Sun’s rays heat up the surface of the road. The heated road then heats thesurrounding air so that the layer of air just above the road is at a higher temperature thanthe air above it.Warm air has a lower refractive index than cool air.DO NOT WRITE IN THIS AREA12 On sunny days a mirage can sometimes be observed when a virtual image of the sky isseen on the surfac

Pearson Edexcel Level 3 GCE Turn over . 2 *P49875A0228* T ITE I THIS AEA T ITE I THIS AEA T ITE I THIS AEA T ITE I THIS AEA T ITE I THIS AEA T ITE I THIS AEA SECTION A Answer ALL questions. All multiple choice questions must be answered with a cross in the box for the correct answer from A

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