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Midterm Exam 1

Midterm Exam 1 - Midterm Exam 1 Fall 2010 Professor Bandy...

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Unformatted text preview: Physics 21 14 Midterm Exam 1 Fall 2010 Professor Bandy Page 1 Signature 34/772?!“ 527' Print Last Name: p05 VIM Sec. # rcblem 1 (3% Fig. I, an isolated and static 3mm) (39psints) A. Three point charges g; = —1.0 nC, q; = +4.0 11C, and q; = —2.0 nC are assembled as shown in Fig. I. I 3. Sketch and label on Fig. 1 the electric ﬁelds at position A. Q1: — / n 6‘ b. Calculate E 2 MA if the separation distance from g; to A is 4 cm. ’9 ‘ " 0. Sketch F2 on 3 on Fig. I, and calculate the force F2 on 3 . 2 c’” ’ CREEK I/ , A ﬂ‘;~\How much work does it take to aseembie this distﬁbutien. we?” 69" - - .2. éﬁ—k; ‘ ' 4'2: ‘9 q. - z 53 52 +I/r2c’ «2m / \K @ Figiﬁ’é 1 K __ a, @an 9 ? ) ° - k 4 7km A/WZ' 'X/c?‘ {3 £2” 3:,” :(f 2: @3 (a , 04/44 J 9' 5’ 7’ «a . n (a) g g R \$333, (9W0 “3;” )(z/x-m a)[—2m ﬁg} .4 20:43” ‘[ a. a ‘ egg?! A (’ e . e gm 3“" m Mn: 7 A Fall 2010 Page 2 Midterm Exam 1 Professor Bandy Physics 21 14 Initials ﬁg Sec. # Problemz (an isoiated and Static system) (35points) An electric dipole is famed from two charges i q spaced 1.0 cm apart The dipole is centered at the origin of coordinate system and oriented along the y-axis. “F- a. ketch and label the dipole charges and its dipole moment ( f? = 2.0 x 10’11}: Cm). f b. Calculate the value of charges at g. c. Caleﬁlate elecﬁic ﬁeld}? an the axis of the dipole 10.5 cm from the charge locaied at (O.00m,0.50m). d. Calculate the electglc ﬁeldE’ at the point (W = (11.0 cm, 0 cm). e. Find tiller/elee’élle ﬂux (1) e threne‘spherical surface centered at the origin and with a radius 10.0 cm. Explain. / P ‘1’ \ [’03 1 (L7 <3; «1 1:" ‘ “05% w it // | @ W i \$36 mfl—gww—ﬂ x I 3’ “ (elm M4") ’ “ﬂ, r: 2 n ii at u . } EL I l (6’) g ,3, kg P g 9W0??? ,)(2>(2,9 x xewylﬂrwiﬂ; rm N, muqu if»; “'Wmmm?a’m\$; of“ aoomgmg 2 .47 E, d A w ” 52w &553 I: ‘ _ IV, ‘\ () EON 7 135.74 5—- {.43} @ Ezaé’azg M W W M mm W {EM :f " “Egg— : 9 55,9}; ‘31-} figs 5‘67» /2 V“ M H mm _ m r e! 5w r»? 61/ @ W) 1, Midterm Exam 1 Professor Bandy Physics 21 14 Initials A Problem 3 (See Fig. 2, an isolated and static system) (Given C1 = 3.0%”, C;- = 2.0,uF, C3 = 1.0%, C; = 2.0/uF, and C5 = 1.0m? else a. Calculate the equivalent capacitance C34 for capacitors C3 and C4. b. Calculate the equivalent capacitance C234 for capacitors C2 , C3, and (34‘ 4:. Calculate the equivalent capacitance Ceq for this system of capacitors. d. Calculate the energy stored in C1 given the potential difference is AV1 = 9.0 volts. B.-—-—l 6. Calculate the electric ﬁeld strength in capacitor (31 C 5 :: My? given the plate area is 3.40 x103 m2. ‘ _ Figure 2 I l I —- z m ’— .. (a) ( 65 Caz)“ ['1 + 1)/“/: a 554/ 55' £22121: («4} 3% A! I «z / (a) i «v; a a V2.6; AW: : {@'§)(ﬁrcx/€3%F> (I‘?v’)m [:23qu Fall 201 O Page 3 Sec. # (35points) dV' = 9.0 V) M,“ . A . . . w . N a W sf ...
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Midterm Exam 1 - Midterm Exam 1 Fall 2010 Professor Bandy...

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