State the law of conservation of electri , vplv*fuhcxk*ze636c charge.

  Is it possible for two negative charges gjx1v 88yryv3uh3o::ldtqt 0to attract each other?

  Is it possible for a positive and a zkww l7ay)w(418m1blzc ; wci negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During8o2dqy b-1l:owt9-z ulhmi+ o the process the glass rod acquires a positive ch2ooi8doq 19z ytwh-- lmb +lu:arge and the silk

  A proton carries a

  The model of the atom shows av,it jfhe3he4f 0yn66:j lo 7c

  A neutral atom alwayscj. 25im dvs6n-m iec) has

  An atom has more electrons than prom.ow -;orio1nh0azt5tt,5*j i,h *. c ddxbcmtons. The atom is

  Materials in which the electrons are bouoly fp;; xmv(/nd very tightly to the nuclei are referredy;x /plm;(vof to as

  Materials in which the electrons are bound very loosely -+ j rs e/ikk3by4rz/zto the nuclei and can move about freely within the mater r4/+3yj/kbiezz skr- ial are referred to as

  A negatively charged rod is brought near one end of an unch3b5yb4oh fqzxf u7,g2 arged metal bar. The end of the metalu7q5f ob,23fby4hgzx bar farthest from the charged rod will be charged

  Sphere A carries a net pogx6.2umqx o.v :h)0er (iezwt sitive charge, and sphere B is neutral. They are placed near each other on an insulated tabligwee qh026xrv..ouxm : zt )(e. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscop, 6kgo c:nweb1xy/0ake positively?

  An originally neutral electrosc m0.e;jx54;dqcflmm+rq z hj6ope is briefly touched with a positively charged glass roqhcrzj 5x0m;4 e6jm+ ;qf.m ldd. The electroscope

  An originally neutral electroscope is grounded briefly while a positively ch1q )yhpbak5kgf2*sx/nn: k 6 carged glass rod is held near it. After q*k /c:xkgkn6naf )s1pb2h 5y the glass rod is removed, the electroscope

  A positive object touches a h/up ,4 h*y 9cvchtn8sxy,/ obneutral electroscope, and the leaves separate. Then a negative8*4 tuo h,ysn,p/9hbx yhc v/c object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged objecmgn4 hsv -h5o8t is placed on an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball rolls along the path followed by the first ball, strikes the first ball, and stops. The first ball rolls forward, but does not touch the negative object. At no time does either ball touch the negativ 5sg4 8novh-mhe object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb constan7/vojb9d*il g vqwxvp)9:)r o yek9-it $k$, which appears in Coulomb's law?

  Two charged objects are separated byl*ny9lo bj 85q w/fl2t a distance d. The first charge is larger in magnitude than the second q2l w8jt 9*fnoyl5lb/charge.

  Sphere A carries a net charge and sphere B is neutral. They agy-s w1m) cvri y cn+y.g/*fl2re placed near each other on an insulated table. Which statement best describes the electrostatic force between th2wc/v y rs.lg-1 c)+figyym*nem?

  Two charged objects attract each other with a certain force. If the chargeb7m 7 u4xv (5o+yffbfms on both objects are doubled wi5ym x 7bbum+ff47f(ovth no change in separation, the force between them

  Two charges are separated by a distance de/xj. )z og1k0 bavw q65j7tsz and exert mutual attractive forces of F on each other. If the charges are separated by a dist zbej sq6k)1gz vtwo j5x.a7/0ance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the forclo36)eqq owwt6 om0/geq- ;l me between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one-fo6 emqow tqgle-o; /)6 lm0qo3wurth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What hfx,s2jp f jzcc6s;b b:y355w;i,oeax appens to the magnitude of the force on the proton if a second 5cpy o xsb3 c,,xj:;w;iazsf5b6e2fjelectron is placed next to the first electron?

  An electron and a proton are separated by a distance of msbgi(ji z:brvs4d0k6 t., xqm fha /+9pz17c1.0 m. What happens to the magnitude of the force on the first electron if a secsg.z(ixs/jdz01b+p :,m7irkhb a4 vmqc 6 f9tond electron is placed next to the proton?

  An electron and a proton are separated by a distax3 +mt1 ytr gx+,n:cvw)wjp7hnce of 1.0 m. What happens to the size of the force on the proton if the)rc71x+:hy v nm3xptw tg j,+w electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center ofxdy19 ,xf t3,fjg q0-mh,ter k a square. When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic force of 2.0 e,x0,tq 1k ht9dyf3rjgf xm,-N acts on the positive charge at the square's center. Now, identical charges of -Q are placed at the other three corners of the square. What is the magnitude of the net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilateral trianga*u auo z-x((yle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N acts on it. What iza uy((x- oa*us the magnitude of the force that acts on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not a vec 4/;.dvesa:ztvmy : yotor?

  At twice the distance from a point charge, the strength of the ) f5t2hzsazavu9y4 h0 electric field

  Is it possible to have a zero electric field value between a negative andn ,synf (cbx(6 positin6,bx (nysf(cve charge along the line joining the two charges?

  Is it possible to have a zsq+ s;o ih vz;xu;h0ahr390kb ero electric field value between two positive charges ss9;h03o+ha0qir ;hk; bzv xu along the line joining the two charges?

  Electric field lines near psitive pointwax 7,+6ztwj qk l +*s1km;uo:kndib- charges

  The electric field show m3jj y+*mrz: ,:xfgzyn

  Can electric field lines intersect in free sbevsl9 c 0)t,space?

  A solid block of met8mnchb+bgp (j2,a-sv- el1d4p8iimdal in electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the bl+( bev p41d ia8j-mib28ms,h-gdpcnl ock's interior.

  If a solid metal sphere and a hollow metal sphe egj8 ;s:egt;2alqc kll67s)wre of equal diameters are each given thew2e);jks8gqa l gl6l ec7s;t: same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in7* fjcwrbv:n5 a region where a uniform electric fie: fnwj7b5 vcr*ld is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostaticn u;1b2g*fcw u equilibrium near an electric charge

  A positive point charge is enclose / 4so2ul fljaj*x01f2zff sf/d in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow* j2/0xffzllfso4u2a s1 f/j f sphere has

State three properties of conutqz5ofh5* lx5 avv1 (4j ,papmhc4+pductors in static equilibrium.

State Gauss's law.

  The charge carried by one ele*g3a ut)8. r kbnkwan, n:mhu;ctron is $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net charge of1c)(jy x vetb --qmbh. +2.00 mC. How many more protons than electrons xj)1tm(becv --h.yqbdoes this piece of plastic have?

  What is the charge on 1 kg of protgk 6*.fi eiubt*ae,6 tons?

  An atomic nucleus has a +ufw*t.z js4mog+ (dzcharge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.5 cm, have chcu1t1h 0f3qcn680rk-r7g vcq y4n oykarge values of 2.0 and -4.0 mC, respec 0yf nygq-unt0 ch1437rq8vkr61cokctively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15de 7 3sy1*f/h.fjsr v u8cesn0 m from a second charge, and the force between them is 1.0 N. j.r* u c3eyv0s f1dhsn/s7e f8What is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. Ho9n4am o)p7ussw far apart are they?

  The force between a :ud+9f(zojm5 yns mq) ovs:i/$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1.0- . /a3n pwvj x:bmjz6,mlkay67N force. If they are moved to a new separation of 8.0 cm, what is the el nk.w:ajja6vm7p/l6,b ymx3 z ectric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. Thelsyogg 05:c 3ai*svd + first charge is at the origin, the second to the right at x = 50 cm, and the third is at the 100 cm mark. What are thgs *ov 3li 0+ac:5sgdye magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis.-v qy;..qa0-f isvevn A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC at the 100 cm mark. What are the magni-ia qfv ;-vyne0.sq.v tude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges a2 3j-ccwbz): hi9cz jr ctsr5;re located at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the magnitude of the force on the 3.00-mC chargzrj bcj -);tw2r 3c59czhi:cse?

  A point charge of +Q is placed at the center of a square, ahq1+;7fgvfdqn gtz b 9x *0kw59yn i0cnd a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the positive charge at the center. What is the magnitude of the force that acts on the center charge if a third charge of -Q is placed at 1 0n*vq+i zt7q9ggny h9xcbwfkd;f50 the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = / d v8eof+2jz f:wzch4-1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net fo8zz e 4wvf:fd2+hc /jorce on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0m 3p99fu 7kufs nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). pk9 ufsuf379 m What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mCap vg2d3 h-b9zws.)yc are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic fo s v23)g9hzbadp wc.y-rce which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. 6c38ji 6 walt1;hvgt nAt what point, on a line between the two charges, would it be possible to place a charge of -Q such th66;vacit8h 1g 3lnwtjat the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is athjnrsjw fe (q*1z2n afl9y-7: x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is zey(wzn9ejhr1 :2 f*n s 7-fqajlro?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Wherg3 nt wmu1k)4ge can a third positive charge +q be plau g4t3g1)nkm wced so that the force on it is zero?

  A copper penny has a mass ohbphsz w.( 2ekky1(q2f 3.0 g. A total of $4.0 \times 10^{12} \; electrons$ are transferred from one neutral penny to another. If the electrostatic force of attraction between the pennies is equal to the weight of a penny, what is the separation between them?

  An electron is held u5.41hwrnb6ydur.t k,h3pmio ii9m ,r 4e wgn8 p against the force of gravity by the attraction of a fixed proton someo4 ,egw13 pn 6h8rk.4nhy.dr5wtb uim9riim, distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheredggn w7kf+ 44gs are hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the thr+7 g w4kdfngg4eads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What r.19n6i pjuu6xna 3 hvjd7 aq)is the magnitude of the electric field aua9vrn di)pj6q.j73n 6a uhx1 t a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the 8a*fnfy7nijru nq 3+9 5sujy:electric field at a distance of 1.50 m from a 507jf:ijf8*aquyn9 n ns+y 3r5u.0-nC charge?

  A 5.0-C charge is 10 m frorg /mf6rl( y9 f3lhy tuelzi2:6x(6nn m a small test charge. What is the magnitude of the electric field at 69r2xl(zn6n gheyrt6u( : ml/f3fiylthe location of the test charge?

  A 5.0-C charge is 10 m from a small test charge.4mf yo(k:zbjfy)5 h;x, 0 kumt What is the direction of the electric fihmjxf0mo;t yfb)kkyz ,5(4:u eld?

  A 5.0-C charge is 10 m from a small test cha.y/-n6bef * iwiw um c50y0oitrge. What is the magnitude of the force experienced by0oi*mt - yiwc.e/n06i fw5u by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separatu7 fo( ri pcd8 vnfr*.ga0i(h:z6mk; ied by a distance of 4.0 m. What is the electric field at a point mi7:io; f(ugzv(mfnh.ir8 akdp c*r 6i 0dway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC(xn3;2+c7cqx nksb6j wbx xa9 charge is;7xc3 6xb2w 9nkqca x+bnxj(s placed at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of b5cy 5/bif;v2xvt+ nb mogj l80t31ara meter stick and a -4.0 mC charge igi 3 ;aovrbn+tfxyvj1 5cbmt /b80l52s placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x =b4 62i)nfb v7rrhrn+j 0 and x = 0.20 m. What is the magnitude of the electric field at thbbv7 2hr4r ij+)rf6n ne point midway between them?

  Three 3.0 mC charges are at the tbh7zx d1svb84hree corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the squax87s4v b1hbdz re.

  Consider a square which is 1.0 m on a side. Charges are placed at the qc 2tg kf;5bm*corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC m gc*bkq25;ftat (1, 0); -3.0 mC at (0, 1). What is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is m g8962dcwv4jxvo vk+placed in a uniform electric field. Wh6dx9j +vc4mkg vv8ow2at is the magnitude of this electric field?

  A particle with a charge oaer app-15 ,7z 6r(qzj o4eeiajie -5ff 4.0 mC has a mass of $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120q o0ms, y+ww5as6+qnbo1xcv39 uvo5j g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be ybqnc wo uv 590+wxs5,3a +1svjoq6mosuspended?

  A foam ball of mass 0.150 g carries a cha1/s8uz 19a0wzny s+iosq e c0urge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity.z/ eow ns z1qyuu 08s+i091sac What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is thc5r(3 fnrc:ls e magnitude of the electric field 5.0 cm from the spherc3 cr5nl(f: sre's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the elec6v5 p izl:61mvkpeqjp- b((*mjfrtw- tric field 6.0 cm from the center of the sphere qi*-5p plzb(:t6 fjv k-er1(pjm6wvm ?