PHYS College Physics II Final Examination Review

Transcription

1 PHYS Cllege Physics II Final Examinatin Review The final examinatin will be based n the fllwing Chapters/Sectins and will cnsist f tw parts. Part 1, cnsisting f Multiple Chice questins, will accunt fr abut 45% f the examinatin grade. Part 2, cnsisting f mainly prblems, will accunt fr the rest f the grade. Other infrmatin abut the examinatin: Students are required t bring their Scantrn Frms The examinatin will last exactly TWO HOURS The examinatin will nt be graded right away. Please d nt request yurs t be graded upn cmpletin. Yu may btain yur final curse grade frm the apprpriate nline webpage. If yu s wish, yu may cme back at the beginning f the next semester t view yur final examinatin paper. Chapter 13. Vibratins and Waves Sectins 13.1 t 13.3 Knw Hke s Law Fx = -kx Understand the meaning f Simple Harmnic Mtin and knw hw t use the equatins fr the velcity and acceleratin f a harmnic scillatr t slve prblems. Knw the definitin f Elastic Ptential Energy stred in a defrmed spring PE e = ½ kx 2 Understand the cncept and the definitins f Amplitude (A), Perid (T), Frequency (f) and Angular Frequency (ω) f any peridic mtin, and knw the equatins that apply t a vibrating mass attached t a spring. Chapter 14. Vibratins and Waves Sectins 14.1 t 14.6 Review the characteristics f waves: lngitudinal as ppsed t transverse waves, mechanical as ppsed t electrmagnetic waves. In particular, and fr sund waves, knw the differences amng audible, infrasnic and ultrasnic waves. PHYS Final Examinatin Review Page 1

2 Knw hw t apply the equatins fr the Average Intensity (I) and fr the Intensity Level f a sund wave ( ) t slve prblems. D nt cnfuse ne with the ther when asked t calculate either f them!! I (W/m 2 ) = Pwer/Area = /A (db) = 10 lg (I/I ) Study the meaning f Dppler Effect as applied t sund waves, i.e., what effects the relative mtin between an bserver and a surce f sund can have n the frequency f the sund as perceived by the bserver. Knw hw t use the equatin fr Dppler Effect in the slutin f prblems. Chapter 15. Electric Frces and Electric Fields Sectins 15.1 t 15.5 Review prperties f electric charges: law f attractin/repulsin between unlike/like charges, cnservatin f electric charge, variables that affect the frce f attractin/repulsin between electric charges. Understand the difference between an electric cnductr and an electric insulatr. Knw hw t use Culmb s Law t calculate the frce f attractin/repulsin between tw pint charges: Knw the definitin f Electric Field. Understand that is a vectr quantity and, when slving prblems, that the effect f electric fields must therefre be added vectrially. Knw what electric field lines are, as well the rules that are used t represent electric fields fr different charge distributins under electrstatic equilibrium. Chapter 16. Electrical Energy and Capacitance Sectins 16.1 t Review the relatinship between the change in electric ptential energy, PE, and the wrk W AB, assciated with the displacement, x, f a charge q in a cnstant electric field,. PE = - W AB =-q E x. x Knw the definitin f electric ptential difference, V. D nt cnfuse electric ptential energy change with electric ptential when asked t calculate ne r the ther! V = PE/q PHYS Final Examinatin Review Page 2

3 Knw hw t calculate the ptential due t a pint charge at a given distance frm it. Remember that electric ptentials carry the sign f the charge that prduced it. When calculating electric ptential energy f a pair f pint charges, remember that the signs f bth participating charges must be taken int accunt. Knw what the electric ptential characteristics f a charged cnductr are, as well as the definitin f an equiptential surface. Review what capacitrs are and the definitin f capacitance. Knw the equatin fr the capacitance, C, f a parallel plate capacitr with plate area A, and plate separatin d with n dielectric in the intervening space. Review the equatins t use fr the slutin f prblems invlving capacitrs in series and/r in parallel. : Understand the effect f dielectrics n the capacitance f a capacitr. Remember that, if cnstant f dielectric, where 1 = dielectric Chapter 17. Current and Resistance Sectins 17.1 t 17.8 Knw the definitin f average electric current, I av,, instantaneus current, and the definitin f current in terms f the drift velcity v D I av = Q/ t and I = nqv D A Review Ohm s Law, i.e., the applied vltage is directly prprtinal t the current fr Ohmic materials. The prprtinality cnstant = R= resistance f the cnductr. where, if = resistivity, R = l/a PHYS Final Examinatin Review Page 3

4 Change f resistance with temperature: Knw hw t use the equatins belw t calculate the pwer delivered/dissipated by a resistr: Knw the difference between regular cnductrs and supercnductr. Prperties f supercnductrs. Chapter 18. Direct-Current Circuits Sectins 18.1 t 18.5 Review the cncept f electrmtive frce f a surce, ε, and hw the terminal vltage f a battery, V, is related t ε and the internal resistance f the battery, r V = ε - I r Knw hw t use the equatins belw t calculate the equivalent resistance, R eq, in prblems invlving resistrs cnnected in series, in parallel and partly in series/parallel. Knw hw t use Kirchhff s Rules t slve cmplex DC circuits Junctin Rule: Sum f currents entering a junctin = Sum f currents leaving the junctin Lp Rule: Sum ptential differences acrss all elements arund any clsed lp in a circuit = 0 Review RC circuits: time-dependence f the charge, Q, and vltage, V, acrss the capacitr and the definitin f the time cnstant,, f the circuit. = RC Chapter 19. Magnetism Sectins PHYS Final Examinatin Review Page 4

5 Knw hw t determine the magnitude and directin f the magnetic frce, F, exerted n a charge, q, mving with velcity,, in a magnetic field, (using the right-hand-rule (RHR) fr the directin and bserve the rule fr psitive r negative charges) F = q v B sin = angle between v and B Review hw t use the right-hand-rule, in cnjunctin with the equatin belw, t determine the magnitude and directin f the frce n a cnductr f length l and carrying current I, when placed in a unifrm external magnetic field, B F = IBl sin = angle between I and B Knw hw use the RHR, and the equatin belw, t calculate the trque exerted n a currentcarrying lp f N turns, placed in an external unifrm magnetic field, B. = NBIA sin = angle between B and the perpendicular t the face f the lp,. A = area f lp; = magnetic mment f lp = IAN Review hw t apply the equatin belw t calculate the radius f the trajectry f a particle f charge q entering a unifrm magnetic field, B, with a velcity perpendicular t it. (Applicatin t mass spectrmeter). m = mass f particle Review hw t use the RHR and the equatin belw, t determine the magnetic field f a lng, straight wire Knw hw t calculate the magnitude and directin f the mutual frce f attractin/repulsin between tw parallel, current-carrying cnductrs, using the RHR and the equatin belw. Review prblems invlving magnetic fields inside current lps and slenids. Chapter 20. Induced Vltages and Inductance Sectins Understand the definitin f the magnetic flux, Φ B, passing thught an area A f a clsed lp. PHYS Final Examinatin Review Page 5

6 Φ B = B A cs = angle between and perpendicular t plane f lp Review Faraday s Law f Electrmagnetic Inductin and Lenz s Law. Knw hw t apply them t slve prblems requiring the calculatin f the magnitude and directin f induced emf s. Understand the cncept f a mtinal emf, and hw it can be calculated fr a cnducting bar f length l mving with velcity v perpendicular t a unifrm external magnetic field Understand the principle f peratin f generatrs used t prduce alternating current. Knw hw t calculate the emf induced in a cil f N turns, each f area A, rtating with angular speed ω in a unifrm external magnetic field ε = NBA ω sin ωt Review RL circuits. Knw the definitins f the self-induced emf in a cil f inductance L carrying a time-varying current. Fr a slenid with N turns, Fr RL circuits, understand hw and why the current in the circuit changes with time. Energy stred in magnetic field f an inductr = ½ LI 2 Chapter 21. Alternating-Current Circuits and Electrmagnetic Waves Sectins 21.1 t 21.6 Review the definitins f rt mean square (rms) currents and vltages as applied t AC circuits. Knw the definitins f capacitive reactance, X C, and inductive reactance, X L, and their dependence n frequency, f. PHYS Final Examinatin Review Page 6

7 Remember that vltage drps acrss inductr and capacitr are given by Knw hw t use the equatins belw fr the slutin f RLC series circuits: where ϕ = phase angle Chapter 22. Reflectin and Refractin f Light Sectins 22.1 t 22.7 Review the Law f Reflectin and the Law f Refractin f Light. Knw hw t use these laws t slve prblems invlving the incidence f light n a bundary between tw hmgeneus, transparent media. Understand the phenmenn f ttal internal reflectin. Knw hw t use the equatin fr the critical angle f reflectin t slve prblems, such as thse related t ptical fibres and multiple reflectins in prisms. Chapter 23. Mirrrs and Lenses Sectins ; Understand the difference between real and virtual images frmed by mirrrs and lenses. PHYS Final Examinatin Review Page 7

8 Knw the types f images frmed by flat, cncave and cnvex mirrrs. Knw hw t use the Mirrr Equatin, and the Magnificatin Equatin, t slve prblems pertaining t the frmatin f images by the three types f mirrrs mentined abve. :Fr spherical mirrrs Review the phenmenn f frmatin f images by refracting surfaces, Knw hw t use the Thin Lens Equatin and the Magnificatin Equatin (same as the equatins quted abve fr mirrrs) t slve prblems invlving frmatin f images by cnverging/diverging lenses. Be careful t use the prper sign cnventins with these equatins! Chapter 24. Wave Optics Sectins 24.1 and 24.2 Knw the cnditins that must be fulfilled fr wave interference phenmena t ccur, and the cnditins under which a sustained pattern f interference can result. Knw hw t apply the equatins belw t predict the psitin f dark and bright fringes btained in Yung s Duble Slit experiment: ) PHYS Final Examinatin Review Page 8