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2BaQ5Sol

# 2BaQ5Sol - Physics ZB-Section ﬂ Electricity and Magnetism...

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Unformatted text preview: Physics ZB-Section ﬂ Electricity and Magnetism Prof. luan K. Schuller Spring 2888 TEST 5 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A 5.0—MF capacitor has a potential difference of 5.0 V applied across its plates. If the potential difference across its plates is increased to 9.0 V, how much additional energy does the capacitor store? A) 140 p.) B) 80 it] C) 280 u] D) 40 it] 2) A capacitor consists of a solid sphere and a concentric hollow sphere. If the two spheres are separated by a 2.0—},Lm gap, and the inner sphere has a radius of 6.0 mm, ﬁnd the capacitance. (The value of 80 is 8.85 x 10-12 C2/N-m2.) A) 2000 pF B) 4000 pF C) 1000 pF 0) 1.0 pF Each plate of a parallel—plate air capacitor has an area of 0.0040 m2, and the separation of the plates is 0.030 mm. An electric field of 1.5 x 106 V/ m is present between the plates. 3) The energy density between the plates is closest to: A) SUI/m3 B) 10 J/rn3 C) 201/1113 D) 15J/m3 E) 25]/m3 QPF l 51.11: I 6111-“ c ‘d S 6 pF F 6 F lZpF I I‘ivIHj— b The capacitive network shown is assembled with initially uncharged capacitors. A potential difference, Vab = +100 V, is applied across the network. The switch 5 in the network is kept open throughout. 4) The potential difference Vcd. across the open switch 8, in SI units, is closest to: A) +40 B) +60 C) —40 D) —60 E) zero 5) Two capacitors, identical except for the dielectric material between their plates, are connected in parallel. One has a material with a material with a dielectric constant of 2, while the other has a material with a dielectric constant of 3. What is the dielectric constant that a material would need to have if the material were to replace the current dielectrics without changing the capacitance of the entire arrangement? 6 5 5 A) 5 B)5 C) 2 D) 6 Name Code Number Version A 6) A Wire has a current density of 18.0 A /mm2. If The drift velocity is 410 x 10"8 m/ s, how many free electrons does the wire have in a. 1.0-m length? The radius of the wire is 1.0 mm. A) 2.8 x 1033 B) 1.8 x 1052 C) 8.8 x 1027 D) 5.5 x 1046 A—2 C .-. S v ”M? Aug: S.OV A QV‘ ._.. :1 0V Ewarﬁ.‘ 9+w-e09 in OK CGpacH-cv f5 ‘ 5 l— 1- Q1 _ | ‘ u 10) Q" =1;:*'EGN‘) ‘Bu'\' '1“ h“: CQSe WC V's-EQJ M G+\$+ M _ C? Q: MN -—> C- (w '5 -.; 1'" " a o 4‘5 _ _ He“. 0-“ 4lvive M Cé‘bacﬂﬁm cavaa‘w mung «cw» g = are since v-‘C Non Ht Can ‘3“34' use Q -; C AU Find M CANE-339 an W © Enfavudax a @ ‘ofakdk \ J. .4. ‘_. _ 3; + }__ C9 ' E- : 14m mm? 49m? as“: © c = i5? r;> GP :‘iﬁpruoowwmc <9 6 u e s '* _ .4— CG) - (has: ‘2'an w 4 _ CG? I: : 4a? 7—) Q3) : L“? ””00“ "' “‘3 ““0 W2 M“ mu \3 = g 4'9 Ed M ?DH\\HQ\ c‘d’ pom” C a 0‘ tesPAcHwe (2] -. Q claw“? m c, -. '2 ___:O_ : —-——-'-—_"(;' -- 8° \] (9 la”; 143m: F Q; (+83:le c a~= VG) " O 1'.- ‘ g 115V COM“ (9 xlo '9 ‘7 m1“. = \I©-u® -—[+=Io VI h=3 an i; ‘\.._-—— Mix} “'4 ; 1“” (43 L” “*1 C-IM : 'LC. ‘91:?" C“ CD: CDVDKV capstan-and ﬁ ft dfelechrl‘c “It =% ‘ 1 Aided-Vic 2-; IL C * ‘1‘. Ce CMMMH- ‘ l a t 7— Lk\*k13 CU F=Kmm \[D=‘-LO¥IO‘3 “L; K = \M I : 18.0 L \MM‘ \$814395 V‘v delw‘“: I! j=6Vg tat-”have 5‘ V" .3 n6 Kala-age : “2 \1b '5 '- n: ,) av? i e‘echms : y‘ x \Jbtuvm-ll n F ...
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2BaQ5Sol - Physics ZB-Section ﬂ Electricity and Magnetism...

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