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251sp10test3soln

251sp10test3soln - Questions(5 points each Please answer...

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Unformatted text preview: Questions (5 points each) Please answer each questions by blackening the letter of the best answer. Q1 A beam of light traveling in air (1%, = l) is incident on the surface of a pool of water (14“,: 1.333). Which of the following is true? a) The light will be totally internally reflected if the angle between the beam and the normal is less than 48.61 ° b) The light will be totally internally reflected if the angle between the beam and the normal is greater than 48.610 c) The light will be totally internally reflected if the angle between the beam and the normal is equal to 4861" o The light will not be totally internally reflected in any of the circumstances above. 77% (9&7 WW flffflfl’o Ff: 57/2 flab/6‘51? a 2‘0 Lamar? Q2 The figure on the left shows a ray of light arriving at the surface of a convex mirror. The focal point and center of curvature of the mirror are marked F and C respectively. The figure on the right shows four possible reflected rays. Which of the rays is the correct reflected ray? @ RayA [71/ V11 F§Lfl /0/A/r’ ydr // m 4445 b) RayB c) RayC d) RayD Problems (30 points each). Please Show your work and circle your answers. Missing or incorrect reasoning will earn no credit. P1 An object 2.8 cm high is placed 22.2 cm from a convex mirror having a focal length of —11.9 cm. Please answer each of the following questions a) What is the position of the final image? b) What is the lateral magnification C) Is this image real or virtual? Explain your answer. (1) Is this image erect or inverted? Explain your answer. a) $2.171, 2., aim—,1 +4.1, 7:? ’: ‘¥t?4/¥M f s g/ M? 22:2 5‘” —- 5“, _”?-Z‘/Z 43:; law: +a3r7/ [7/ WK 52" 22.2, 4} 5/ i5 xf/é’érflzr/é; fit? my; Mama .,/5 {WA rm .. WH/ P2 A series RLC circuit is composed of a 10 mH inductor, a 5 mF capacitor, a 5 Q resistor, and an ac power supply. The power supply provides a current given by 10‘) = 2.0 cos(200t). Please determine. a) The RMS current b) The impedance c) The average power dissipated in the resistor d) The change in angular frequency required for resonance. ,:Iphw ~ a) 1% u; wWa/ww P3 In the figure, 81 is kept closed while 82 is kept open. The value of the inductor is 0.115 H, and the value of the resistance is 120 S2. All of the components are ideal. V Please answer each of the following. I / 31 a) When the current has reached its final value, the energy stored in the inductor is 0.26 J. What is the voltage of the battery? b) Some time after the current has reached its final value, 81 is opened and S2 is closed. Find the current through the inductor 5 X 10—4 seconds later. b) I W/LL flaw/22 [CK/W/fi/J 774M); 82 W/m F/flg arm/WM]? ff :2- ? :7 tszaA/xo'L/ Sec. W" 15/ 760:76 r v /O sV/Dfiy IfiK/o‘y 7: 212g fi'mfi =— P4 The figure shows a beam of light in air incident on an isosceles prism with an apex angle of 53.140. The prism is made of ice, so its index of refraction is 1.309. The incident beam is parallel to the bottom face of the prism. Please answer each of the following. a) What is the angle of incidence, Gail where the beam enters the prism? b) What is the angle of refraction, 6M? 0) The ray travels through the prism until it is incident on the far face. What is the angle of incidence, 9b}? d) What is the angle of refraction where the beam leaves the prism, 6a; 5;; F/QV/{fi Fm man/cw Aflews W L 9 : we 1227217 69/ b) Wax; w mm (2,, claw/ma, vet?” :- MW"? C) / ;q§’€a/ 3?fl‘020 0 fl efr§"3(/L/”:/w” 5‘9 Keel/47“ , x 0 MW? TMF 6b2’27fl’f’ Zg/é‘ @zjs—afllo_6§ I v I J1! &) Wat/5 Mw/ A‘é/HN L 3.9? 3/4/8315”) 4/].5/4/fi/L 39 ...
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