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P202_Ch21 - = 3837011 Topic 4 Ch 21 and 22 AC Circuits and...

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Unformatted text preview: = 3837011 Topic 4 - Ch. 21 and 22: AC Circuits and Magnetism SD flu-huh" Section 1 - Homework Problems Question 1 Question Index: 3224 With the switch in position A, 11.2 pF capacitor is fully charged by the 12.0V battery, and the 9.5 pF capacitor is uncharged. The switch is now moved to position B. As a result, charge flows between the capacitors until they have the same voltage across their plates. A S _ 12$ V 11.2 52F 950uF Find this voltage: l ( 6.4928 )[e3] V Flags Description of hint flags on - Error percentage of n allowed for numerical answer Piish me! to continue. , CALM Version 5 i I Copyright 1997 Critical Thinking Inc. _ Copyright 2001 The Trustees of Indiana Universim [ID WlUU/L SWll’l/e» l5 EM FMH’IKDH fat I [Lva CWP'XM‘TW [‘5 .Fwi Jackyki QSCV :Qllflgfiflz : quqxlfi C Q) \NLM SWIM l; m past-than B, W {RM lmm Hap? to 65p]: WhtlJL ’rlwa W m SW mallow ~. 4; V : g, :__e__1__ :. v :33; l.\7fi&z+Qa=;.|’179,_=l.344ch 1 Cl ”.2 ?|§ 92: le‘qxugtFC, ‘11.; :3: as Wale-Wig: V — 91 — “W‘VC --t v Q1+Q12Q2L34LFXISLFC 2 Cl — a'S—xmfibF‘ ' ‘1 éé57011 Topic 4 - Ch. 21 and 22: AC Circuits and Magnetism Section 1 - Homework Problems Question 2 Question Index: 3225 The capacitor in an RC circuit (R2187 9, C=50 p) is initially uncharged. Find the current in the circuit: (a) right after the circuit is connected to a 9.0-V battery. I (0.0481283422459893 )[e3] A (b) one time constant (t=RC) after the circuit is connected to a 9.0—V battery. I ( 0.0177112299465241 )[e3] A. Flags Description of hint flags en - Error percentage of n allowed for numerical answer to continue. ALM Version 5 Copyright 1997 Critical Thinking Inc. Copyright 2001 The Trustees of Indiana Universifl Mil IVY—mg (“U f“ C“) LJVleA/QJL ?’i%qI”VC=D Vale Judi affirm cereal/T ts mmd‘ui ii fi’~l8’]I=o , Izmtg m. :10 U?) Iii):IO€t/RL _e L Itt=ec)= Wig" ‘3 R ‘m Topic 4 - Ch. 21 and 22: AC Circuits and Magnetism Section 1 - Homework Problems Question 3 Question Index: 3227 3. A flash unit for a camera has a capacitance of 1200 uF. What resistance is needed in this RC circuit if the flash is to charge to 90% of its full charge in t=29 5? Resistance needed: I ( 10495.448 )[e3] (2. Flags Description of hint flags en - Error percentage of n allowed for numerical answer l 3 Copyright 1997 Critical Thinking Inc. Copyright 200] The Trustees of Indiana University e’tflc 616)er U /) art—.239): of? A, = QC, U 62?“) =1? 0. : l-éfi ac; éfi/kc: 0'[ vim/Rt: MU). I) 9 Re: [2 gal Topic 4 - Ch. 21 and 22: AC Circuits and Magnetism Section 1 - Homework Problems Question 4 Question Index: 3226 The switch in the RC circuit shown in the figure below is closed at t=0. (a) How much power is dissapated in the 24 Q resistor just after t=0? ( 9.375 )[e3] W. (b) What is the charge on the capacitor at the time t=0.1 ms? ( 0.000129481575296434 )[e3] C. Flags Description of hint flags en - Error percentage of n allowed for numerical answer Copyright 1997 Critical Thinking Inc‘ Copyright 2001 The Trustees of Indiana Universim (at) WWDA/P/WI: st ; Topic 4 - Ch. 21 and 22: AC Circuits and Magnetism Section 1 - Homework Problems Question 5 Question Index: 3228 A three-way light bulb has two filaments with resistances R1 and R2 connected in series. The resistors are connected. to three terminals, and the light switch determines which two of the three terminals are connected to a potential difference of 120 V at any given time. When terminals A and B are connected to 120 V the bulb uses Pl:100 W of power. When terminals A ans C are connected to 120 V the bulb uses P2254 W of power. A (a) What is the resistance R1?[ ( 144 )[e3] 9 (b) What is the resistance R2? | ( 122.666666666667 )[63] ll Flags Description of hint flags en - Error percentage of it allowed for numerical answer to continue. 1. CALM Version 5 l I Copyright 1997 Critical Thinking Inc. Copyright 2001 The Trustees of Indian-a University (a) 12mm A—B , F|=V7|Q=l7°%ql =(cm lantern! U9) buxom A’C, P2=VVRZIMLAQI+Q>>151 ‘QtTRZ:'D—Lénb?flr 3218011 Topic 4 - Ch. 21 and 22: AC Circuits and Magnetism Section 1 - Homework Problems Question 6 Question Index: 3222 Three resistors (R, 0.5R, 2R) are connected to a battery. (3) If the resistors are connected in series, which one has the greatest rate of energy dissipation? | Select one |( 2R) (b) If the resistors are connected in parallel, which one has the greatest rate of energy dissipation? I Select one [( 0.5R) Push“ to continue. M Version 5 ¢Copyright 1997 Critical Thinking Inc. y: Copyright 2001 The Trustees of Indiana University R 0.91 2K '10: PV: VVIQ: 11K (a) W 1—} ——> —> Thou, YLSBtmrg km Hut SW (”i/”WM . I I. I P: 112%, 05132 @ i l ZR llam— tioi qrm‘rcrt mil. 03!: W Aissi‘podmm 12 [19) M “ Three refifstm Lam Hi gm Wfl—Tflflfi. 211 Page; Vlo‘CK QVVK <4“— 05 km flu Twist, not iozn = L242 :O'SV7R 91C W okrssipq‘rim . 11! u. a _, r a ' 1 . _3128011' Topic 4 - Ch. 21 and 22: AC Circuits and Magnetism Section 1 - Homework Problems Question '7 Question Index: 3223 A portable CD player uses a current of 1:6 mA at a potential difference of 3.5V. How much energy does the player use in t=49 s?| ( 1.029 )[e3] I Flags Description of hint flags en — Error percentage of n allowed for numerical answer to continue. ALM Version 5 Copyright 1997 Critical Thinking Inc. Copyright 2001 The Trustees of Indiana University h?_ IDMM: PSVI =3,Sx6m§3: [1.]le W 9W3”? 7* PX JEFW- =(QJXI6ZWM4‘13) =- 3038011 Topic 4 - Ch. 21 and 22: AC Circuits and Magnetism Section 1 - Homework Problems Question 8 Question Index: 2416 An electron moves at right angle to a magnetic field of 0.2 T. What is its speed if the force exerted on it is 7.9 x1015 N. [— (246875 )[e3] m/s Flags Description of hint flags en - Error percentage of n allowed for numerical answer Push-rue! to continue. :. CALM Version 5 I l Copyright 1997 Critical Thinking Inc. Copyright 200] The Trustees of Indiana University W] a \ ‘19 a WWW 5m :Htxla” x 11‘): 9‘2, x smfio° U—r—d ll —|S’ —\ 73X1D ‘—‘ szm x/U‘xo.?— Topic 4 - Ch. 21 and 22: AC Circuits and Magnetism Section 1 - Homework Problems Question 9 Question Index: 2418 An electron moving with a speed of 6.4 x 105 m/s in the positive x—direction experiences zero magnetic force. When it moves in the positive y—direction it experiences a magnetic force of 2.3 x 10'14 N that points in the negative z-direction. What is the direction and magnitude of the magnetic field? (e = —1.60 x 10‘19 C) The direction of the magnetic field is I Select one [( -X ) direction, and magnitude of the magnetic field is | ( 0224609375 )[e3] T. Flags Description of hint flags en - Error percentage of n allowed for numerical answer _ Push me!‘ y; to continue. CALM Version 5 Copyright 1997 Critical Thinking Inc. Copyright 2001 The Trustees of Indiana Universig ’13" (a HWYW/S -——-—-—>;+§<‘ No Wajunc firm. =§ B is ding +X (W —x) OiAYECin-‘Wk /\ '9 [U- Q 1? - 1 ex I; m- /. .5: g / FM is aim“: HM -E firearm 1%?me Z .2; .2. + :% «H B .3 M-Hag Hg) AALYec‘tI‘b-n a; tel: 1.3mm“; =[6-WHJICMM3) B 311 Topic 4 - Ch. 21 and 22: AC Circuits and Magnetism Section 1 - Homework Problems Question 10 Question Index: 2419 Charged particles pass through a velocity selector with electric and magnetic fields at right angles to each other, as shown in the following figure. If the electric field has a magnitude of 381 N/C and the magnetic field has a magnitude of 0.20 T, what speed must the particles have to pass through the selector undeflected? The velocity is] ( 1905 )[e3] m/s. Flags Description of hint flags en - Error percentage of n allowed for numerical answer l I Copyright 1997 Critical Thinking Inc. Copyright 2001 The Trustees of Indiana University What/wife fwd—r Hm: ng $018“ Ema-(L yams Thymjk Md’llgtcttci 3% NJ aim/UL : 0 $ Wtjmfir/W COM/1021.3 (NJ dumb {m ‘9‘ng girl: =i‘ “:15 = 38‘ = (tom/s ...
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