2BaQuiz8Sol

# 2BaQuiz8Sol - Physics ZB—Section ﬂ Electricity and...

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Unformatted text preview: Physics ZB—Section ﬂ Electricity and Magnetism Prof. luan K. Schuller Spring 208 TE ST 8 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Figure 1 «t— 20 cm—oh x X X T x x x 20cm :n: x x 1 a b 10:2 1) In Figure 1, a wire and a 10 ohm resistor are used to form a circuit in the shape of a square, 20 cm by 20 cm. A uniform but non-steady magnetic field is directed into the plane of the circuit. The magnitude of the magnetic field is decreased from 0.90 T to 0.30 T in a time interval of 60 ms. The average induced current and its direction through the resistor, in this time interval, are closest to: A) 60 mA, from a to b B) 24 mA, from a to b C) 40 mA, from b to a D) 24 mA, from b to a E) 40 mA, from a to b A long vertical wire carries a steady 10 A current. A pair of rails are horizontal and are 0.20 m apart. A 20 ohm resistor connects points a and b, at the end of the rails. A bar is in contact with the rails, and is moved by an external force with a constant velocity of 0.40 m/ s, as shown. The bar and the rails have negligible resistance. At a given instant t1, the bar is 0.20 m from the wire, as shown. 2) In Figure 2, at time t1, the induced current and its direction through the resistor are closest to: A) 0.04 MA, from a to b B) 0.12 “A, from b to a C) 0.02 MA, from b to a D) 0.02 MA, from a to b E) 0.04 uA, from b to a Name Code Number Version A Figure 3 s 3) In Figure 3, a coil of wire is placed on the axis of a solenoid carrying a DC current. Which of the following will NOT result in an EMF being induced in the coil? A) Rotate the coil about the x—axis. B) Rotate the coil about the y—axis. C) Move the coil toward point P. D) Change the current in the solenoid. E) Rotate the coil about the z—axis. 4) In Figure 4, a bar magnet moves away from the solenoid. The induced current through the resistor R is: A) from b to a B) from a to b C) zero 5) In Figure 5, a bar is in contact with a pair of parallel rails and is in motion with velocity V. A uniform magnetic field is present. The induced current through the resistor R is: A) from a to b B) zero C) from b to a Figure 6 . b 6) In Figure 6, a loop carries a steady current I. A bar is in contact with a pair of circular rails, and rotates about the center of the loop. The induced current through the resistor R is: A) from a to b B) zero C) from b to a A—3 Answer Key Testname: ZB—OS—TESTSA 1)C 2)A 3)E 4)B 5)B 6)C Name Code Number Version '8‘: b.°10T ——> 0,30T 5i -, (poms 4‘3 : o-Lpo'f (P = 8:53-41: 1 EA '9'— ‘20 QMF?D(,W~ — ,aqM ‘5 {awk of anom‘rt) 4¢ 6‘3 c 6:3 J: A9": A5&/O_'_q>s;£> * K ch 4% 8 '— A At (0 Lao-r3 _ L v‘ .— G04“ (woﬁlb-fb 8) «HS 7 I= 2—: Co .oqmﬁqoma\ g -——___- 'T‘A‘S UAW-ch" (lows \$0M +6 )CC‘oste M -(1u)z is decwc‘ﬁwj hwme ‘bu loo-P 89 M Clutch} mgr Neal-e a 1'2: (:44 m Me com divechm dd M decveus\k%ov—n I m’rv W 1203.9: tux? mum M £19!» Clockwise . w T; 0 ‘ ‘ e d d‘vdi +0 M wwe L: = ID *9) 3C; a 5 pa]: 5 )4. (“79:3 . +0 ’2 __—_ \V\ “Y r M V03; (1)3: 1 (Bi): A493 a ..—-—— : “Bi .1- ; 'Bku cu 6‘" - U ’zﬁ‘f')‘. 1-“— (0-2.wa muww word ‘3:- 83‘10‘. \l gun in Cunt rs chcveasim‘ Cuvr-Ev‘d' {‘iows (n “WOW! New} Waweh‘; Elem is \vx 41»: “‘9 m+ 9* 'f‘u— IOIA wine. Such SW Aircch‘m +9 Who WMW‘C chV-EMV “(IUWS Clock-WISE W "3 @1109 Eva-h Mpao‘}; . Curveu-{P-(‘lowy ﬁnk WW1 J \g/r Yuk-Hch 030m M Jz-ayi: w?“ NOT vmduw CM 94" m m can, because .‘+ um‘u m’t mvcae +£4.12 '6 {549142 (W ‘é £11430: ngmmc Mame? m %.axis) 4 (-43:31 a 1L \o Nomad? cum:qu Nexus {rum ‘0 +0 \3( \umse m Hm; ‘hn‘wU-ﬁ‘lm M Qvlehoid l'S deckeusi so have T's an \woiuuo‘ '13; ﬁeld in M saw an. as +3.94" 0 .9 M Lee; M3 M+ MN I j +0 M " t (9H. m ‘lhduced’ cuwremf 'MmupXA YCS‘IS-hw “L ‘5 iacvoK because M mgﬂ’r‘l ﬁeld is avipomllel +0 Mien 9-! no maH-ev ww‘ . «ha oﬁvech‘m 9-? M boY 1mm \»\ I 1 ax N «3 Ma awe 4o cuwcn’r I kwsq CMPMH M \$439 We‘ “‘1 M '90? LuHu "FAQ “WINE b“ A M (role! 40 Cauce‘ M 'E; 92H: Emmet-aged? «Fray ﬁrst? mum be an ‘ an M mash, MVP FROM/{£909 "E can?” “LN 'Pé'Of <20 Cﬂerwh '(‘uuﬁ ((m (3‘0 B Emacs-Q5) loo? 15 3-6“) QM‘F 0"- N ‘00? ivva ‘———. ...
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## This note was uploaded on 07/04/2010 for the course PHYS PHYS 2B taught by Professor Sinha during the Spring '09 term at UCSD.

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2BaQuiz8Sol - Physics ZB—Section ﬂ Electricity and...

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