Cambridge AssessmentInternational EducationCambridge International AS A LevelCANDIDATENAMECENTRECANDIDATENUMBERNUMBERPHYSICS9702/42Paper 4 A Level Structured QuestionsFebruary/March 20232 hoursYou must answer on the question paper.No additional materials are needed.INSTRUCTIONS.Answer all questions.Use a black or dark blue pen.You may use an HB pencil for any diagrams or graphs.Write your name,centre number and candidate number in the boxes at the top of the page.Write your answer to each question in the space provided.Do not use an erasable pen or correction fluid.Do not write on any bar codes.You may use a calculator.You should show all your working and use appropriate unitsINFORMATION.The total mark for this paper is 100.The number of marks for each question or part question is shown in brackets ]This document has 32 pages.Any blank pages are indicated.DC(CVJG)315714/3©UCLES2023[Turn over2Dataacceleration of free fallg=9.81ms2speed of light in free spacec=3.00×108ms-1elementary chargee=1.60×1019Cunified atomic mass unit1u=1.66×1027kgrest mass of protonm。=1.67×1027kgrest mass of electronm。=9.11×1031kgAvogadro constantNa=6.02×1023mol-1molar gas constantR =8.31 JK-1mol1Boltzmann constantk=1.38×1023JK-1gravitational constantG=6.67×10-11Nm2kg2permittivity of free space60=8.85×1012Fm1Planck constanth=6.63×1034JsStefan-Boltzmann constanto=5.67×108Wm2K4Formulaeuniformly accelerated motion2=u2+2ashydrostatic pressure△p=pg△hupthrustF pgVDoppler effect for sound wavesresistors in series1resistors in parallel©UCLES20239702/42/F/M233gravitational potential=GMgravitational potential energyEp=_GMmpressure of an ideal gassimple harmonic motiona =-02xvelocity of particle in s.h.m.electric potentialQQqcapacitors in seriescapacitors in paralleldischarge of a capacitorHall voltageradioactive decayX xe-idecay constant1=0.693intensity reflection coefficientStefan-Boltzmann lawDoppler redshift©UCLES2023