Quiz-1-Spring-2002

# Quiz-1-Spring-2002 - -~ mum “an“ ‘hiﬂillltk...

This preview shows pages 1–3. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: : - -~- mum .. “an“..- - ‘hiﬂillltk ‘. 'TT‘L V Hilfii'i 5-, LIBRARY l OF lllCIHU'I 6 Physics Department Physics 211 March 11, 2002 Quiz I Time: 1 hour Name: ID number Major Remark: A correct answer without a solution is not counted Given : ke = 1/(41reo) = 9x109 SI T ry to dot/21's test in one hour once only. 1. 2. 3. A particle ( m = 50 g, (1 : 5.0 ,iiC ) is released from rest when it is 50 cm from a second particle ( Q _= —20 ,uC ). Determine the magnitude ofthe initial acceleration of the 50 g. F a. 54m/sz b. 90 m/frz c. 72ml32 d. 65 oar/fr“7 e. 36m/s2 F" I 4. A large, ﬂat, non—conducting surface has a uniform charge density 0 . A small circular hole of radius R has been cut in the middle of the surface, as shown in the ﬁgure. Ignore ﬁnging ofthe ﬁeld lines around all edges, and calculate ( using the superposition principle) the electric Qield at point P , a distance 2 from from the center of the hole along its axis. Solution: l M". . 1AM ERIC \:~' tannsrr in L 1 B 22 A R Y I'rl" lliillill'i l I _.._ "Md—I“ 6.0 mm ) has a non—uniform volume nd r is the distance from the 2.0 mm 5. A long non-conducting cylinder ( radius = charge density given by orr2 , where o. = 6.0 mC/mj a axis of the cylinder. What is the magnitude of the electric ﬁeld at a point from the axis? (.The answers are given with two significant ﬁgures) a. 1.4 N/C b. 1.6 [WC 0. 1.8 N/C d. 2.0 N/C e. 5.4 N/‘C /' ‘r 1 Solution: . — 6.0 cm ) has a charge uniformly distributed on 6. A long cylindrical shell (radius — its surface. If the magnitude of the electric ﬁeld at a point 8.0 cm radially outward from the axis of the shell is 85 MC , how much charge is distributed on a 2.0 m length of the charged cylindrical surface? a. 0.38nC b. 0.76 nC c. 0.19HC d. 0.57HC e. 0.98MC Solution 7. A proton ( mass = 1.67 x 10'27 kg , charge = 1.60 x 10‘19 C) moves from a point A to point B under the inﬂuence of an electrostatic force only. At point A the prot’on moves with a speed of 60 inn/s . At point B the speed of the proton is 80 kin/s . Determine the potential difference VB — V A. 21. +15 V b. -15 V c. —33 V d. +33 V e. -20 V Solution: shape has a net charge of + 10 ,uC . Inside the go q = + 3.0 #C. What is the surface of the conductor? ( Give 8. An isolated conductor of arbitrary conductor is a cavity within which is a point char charge (a) on the cavity wall and (b) on the outer your solution) 9. Two particles, each having a mass of 3.0 mg and having equal but opposite charges of magnitude of 6.0 ”C, are released simultaneously from rest when they are a very large distance apart. What distance separates the two at the instant when each has a speed of 5.0 m/s. b. 8.6mm c. 7.3mm d. 5.6mm e. 2.2 mm a. 4.3 mm SLERHJ‘. FNI‘VEBEIT [uranium] (1F millu"! “W Solution; 10. ge ofuniform density 12 nC/m is distributed along x axis from x = 2.0 m to x = 5.0 Hi. What is the electric potential (relative to zero at inﬁnity) at the origine (x = 0.0 . m) ‘? a. 91 V b. 82 V C. 74 V d. 99 V e. 101 V Solution: 11. In the ﬁgure, if Va — V = 22 V, how much energy is the 50 #F capacitor? a. 0.78 m] b. 0.58 111.] c. 0.68 m] d. 0.48 m] e. 0.28 m} 25 MF Solution: a l I 50M? b nJ 25m 12. A 30 #17 capacitor is charged to 40 V and then connected across an initially uncharged 20 #17 capacitor. What is the ﬁnal potential difference across the 30 ,uF capacitor? a. 15V b. 40V 0. 18V d. 21V 2:. 24V Solution: l Vf i ’ ...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern