State the law of conservation of electric chan+hes* yd* 8vce7z7zx rge.

  Is it possible for two negative charges to attract each27nojwwnekv0 i .4 wo4 other?

  Is it possible for a nd:9d7rdtoh ;positive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process6 t+5egdd mb6r the glass rod acquires a positibg6d6t5ed m+ rve charge and the silk

  A proton carries a

  The model of the atom shows aut9x )vru)tp.p,: v qr

  A neutral atom always hay(2-+lc a 4b kadtlw+s6ghiz:s

  An atom has more electrons than protons. The -.o2v1m)m(qaw55f dnlfl x bv atom is

  Materials in which the electrons are bound very tightly t 9scdpsana s) f-ee54.o the nuclei are referred t5f caeea )ds.p ss94-no as

  Materials in which the electrons are bou gya+ ;5qr4uiand very loosely to the nuclei and can mov qg4;a5 uari+ye about freely within the material are referred to as

  A negatively charged rod is brought near o:usmjcl,agu)( 1 qva0ne end of an uncharged metal bar. The end of the metal bar farthest fgmuv s:jau)a ql,1(c 0rom the charged rod will be charged

  Sphere A carries a net positivej9)zjzz 1 vse0 charge, and sphere B is neutral. They are placed nz szjve9z)1 0jear each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod +tl*yziuwab f8jnkb*)uf9 82 charge an electroscope positively?

  An originally neutral electroscope is briefly touched zx.r 6t+t cww9ox-rsw6v-cq/0xe6wewith a positively charged glass rod.oxw-.9xe+6 v-6we/ccrw0tw txq6 zsr The electroscope

  An originally neutral electroscope is grounded briefly whi1vir-d ezvbck:iu+t. .i4 7uule a positively charged glass rod is held n1.: .+ ku4et u7c ii-dirvzbuvear it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscopeb vdt) t6c,i62we0d hy;p,ogh, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. wgv btdh,yhdi)206eo,; 6cpt What happens to the leaves?

  A large negatively chk(n6 6: oip,kq t1kggzarged object 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 b(k np 6i:,k6togk zgq1all touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb constant ym5,y(7opsmq $k$, which appears in Coulomb's law?

  Two charged objects are separated by a dio +)7 whb( jcrl:ynhm6stance d. The first charge is larger in magnitude rh7 bhmlcy6wn ):j+o(than the second charge.

  Sphere A carries a net charge and sphere B is neutral. Twmd0w j spwl n-yu-/87hey are placed near each other on an insulated table. Which statement bessw w0md7w-u-j/8pyl nt describes the electrostatic force between them?

  Two charged objects attract each other with a certain fxplenj82l,s/p, 5wv1h s z,pxorce. If the charges on both objects are doubled with no change in separation, the force 8v,,z /x,l1nxswh5sp2 pp jelbetween them

  Two charges are separated by a distance d and exert mutual attract xowv v+mi0i2*ive forces of F on each other. If the charges are separated by a distance of d/3, what are the new x0iwv2ov+* mi mutual forces?

  Two charged objects attract each other wi6ui sm:.w i+vsu: 8 ogt*sxe4lth a force F. What happens to the force between them if one charge is doubled, the other i.::ssm *+6 twxesli8gvu4 oucharge is tripled, and the separation distance between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated bysh:mg ,8vs8s6iw y8cq a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed:8gsyq s8s, c h6im8vw next to the first electron?

  An electron and a proton are separated by a qwh5t 3wv5c+wdistance of 1.0 m. What happens to the magnitude of the forcww3ch5v 5wt +qe on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distanc yde/iw(bzo0h .)n y*6s nue1ce of 1.0 m. What happens to the size of the force on the prd.ie*1os6zhwnyyune(c0/b ) oton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a e4s n 1e02gq3gu :mfcmxpt g)8second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic force of 2.0 N acts on the positive charge at the square's center. Nowm mn g3txeg41 supf8):cq2e0g, 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 triayttpgcf -x st4ho(8(0r h/bm)ngle. 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 is the magnitude of the force that acts on the center charge due to a third chargctb48-0otg)pr ym (hh/( xs fte of +Q placed at one of the other vertices?

  Which of the following is not a ve8 s. gn50or syvfh1fm69tabf2ctor?

  At twice the distance from a point charge, the strength of the electric htj 9c3,/4zsja)h qlefield

  Is it possible to have a zero electric field h hq,.1*dw2cvllz6g7ug t9 cx value between a negative and positive charge along the line joining the two charg6lu7,gxv9hzt2dc *hgw lq 1.ces?

  Is it possible to have a zer2.fddky( lzilgt3 ; v m600c ozd1mww/o electric field value between two positive charges along the line joining the two charges?cwd/0vkgtldm2(y .;d0zof1ilwz 3 6m

  Electric field lines near psxus; vf:e cxw0nnr7b14n )8sditive point charges

  The electric field shof1n0 vf29gudlq)a- d:no5wypg 4e e. mwn

  Can electric field lines intersect in free s:,k- oy2yopnupace?

  A solid block of metal in electrostatic equilibrium is placed in a ,s b0-9jjhx m6ypjxi3uniform electric field. Give a statement concerning the electric field in the 0b m ,yxjspjij-h36x9block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diame/lfu ge85l*xnters are each given the same charge, the electric field (E) midway between the centex el8g *5n/uflr and the surface is

  A cubic block of aluminum rests on a wooden table in a regionmn jm:25t3mzt;ka f4)6st lts where a uniform electric field is directed straight upward. What can be sai6k3ajl4;sttm)f2tm: t z5s mnd concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electricmmb vrrzxxer .,8h *s*u0c9*j)e o wr- charge

  A positive point charge is enct , 4ckgfn1bk(a,5 vkay)sn1plosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric fp(kk4ts)a1 gb5vfy,an1 , nckield at a point directly above the hollow sphere has

State three properties of conductors in statiocpz5pp)b /+xc equilibrium.

State Gauss's law.

  The charge carried by or0 :lx5oqzw 7uis g*0wne electron 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 h wp2 e7q(lt,bvas a net charge of +2.00 mC. How many more protons than electrons does this piece of plastict(v eqw,lpb2 7 have?

  What is the charge on 1 kg )dlq+5dg(z1 bkvybfxa vx:m,;0m 8t q of protons?

  An atomic nucleus has a charge y+aijgmjas1)z0 5 0r jof $+40e$. 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 charge values of 2.0 a j:;3uv6em0gurv /w spnd -4.0 mC, respectively. What is e0uv:rpuvm6j 3/ sg;wthe magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force bezakv n8: ,;d,,patzretween them is 1.0 N. What is the magnitude of the second,,peaartd 8:v ;nz,zk charge?

  Two 1.0-C charges have a force br tg/c.q c./o1 zufr3tetween them of 1.0 N. How far apart are they?

  The force between a bxsr:2) /b)h , fcmucm$30 \; mC$ 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 4qee(v rr3nd pv1:+os /thu ij,8 7lzj1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between thhnue1l ev7t+/:r j4jr8 o,zs(p qi3dvem?

  Three identical point charges of 2.0 mC are pl r 0s)9.nak, sqhu4lpfof 5g0(ad:v placed on the x-axis. The 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 arl,r pp9f qvf)us( l.:a504o0nskhg ade the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axi3b a orykr +4smj 2lg5km0zz f9+u9r2ns. A charge of +2.0 mC is placed at the origin, -2.0 m C to0 lfmuba2y2+zog5+ mz k9r rsn93 r4jk the right at x = 50 cm, and +4.0 mC at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mj wiplb,,8usn3l z)o 7C at x = 1.00 m; Q2 zb) owpn ,jlli3,su87= 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 charge?

  A point charge of +Q i yi7iwao8 *x -vtx2/2lzcyh4fs placed at the center of a square, and a second point charge of -Q is placed at the upper-left corner. It is observedczayto xh/8ifv wl7* xy-i224 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 the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.e:u 25vz2sw tv0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the vu25vt wz 2:senet force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC -dtyjau :7 2;y +fksqqis at (0, 0). What is the direction of the -2 kyqut:7f;d qys+ajnet force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices odem 8j/ ;.z5 bxm- g2la2pmitrf an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force whi2 eji 5mga 8lz/bm d.2m;rxt-pch acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separaehww*nz nt4 09ted by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it nn0h9tw e*z4w would be zero?

  A +3.0-C charge is at the origin and a +9.07rv7 bn0+kl4g)ew qsx -C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force onnrl4 0 wskebgxv)7q7+ it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where cfik s/ 87li*fqbxnn-9an a thirkl 9fi7*nsnqx8 - bf/id positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A total ofq ul2y2qa+t9az,w a bv+(tr: m $4.0 \times 10^{12} \; electrons$ 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 up against the force of hem/cv tw p21(gravity by the attraction of a fixed proton some distance above i etw2(cm/p1 vht. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting thg;cp/ywdg im5692o 1pr5zsclofo3l 1 reads which are 30 cm long. Both are given identical charge5 mdc ; r/9lizgc11sg pwo32o56oflyps, and the electrostatic repulsion forces them apart until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charg,tt9h9 sdgzho d2) 9qtp+qug/ e of +40e. What is the magnitude of the electric field attdsh/ q2gotz+d9 h,pq 9gu9)t a distance of 1.0 m from the nucleus?

  What are the magnitude a;r18m u+yevufiil6 3b nd direction of the electric field at a distance of 1.50 m from a 50.0-nC cha r8ei6ib m+y1vuful 3;rge?

  A 5.0-C charge is 10 m from a small test charge. W *m.xt d7;edljhat is the magnitude of the electric field at the location of the test charg 7xlj tdem.d;*e?

  A 5.0-C charge is 10 m from a small test charge. What is thjl8g;9t oq)mt0 iaz)re direction of the electric field?)i ra89;t 0qmolgz)jt

  A 5.0-C charge is 10 m from a small test charge. Whawok8vz 6njnn5fk2c*n 0b69 jrt is the magnitude of the force expe n wrbzfk 6609kn5j2 8*ojcvnnrienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value oftckw.a*s - 5ptd6+ovv 3.0 C and are separated by a distance of 4.0 m. What is the electric field-spdawv+o 6 k.v *tt5c at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark oeh h2i:cq9.v8l vny6x f a meter stick and a -4.0 mC charge is placx6 vnycliv 2 :89h.ehqed 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 a meter9qc-ur pw7w 0rfr. mz8 stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field qmcruwz 90r7f-rp.8wzero?

  Two point charges of +3.0 mC and -7.0 mC are placed5y)ydk*e1h nz at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point m1*5nek)y yz dhidway between them?

  Three 3.0 mC charges are at the three cors aqlrbfwve 0 m(6jt-r3orf9x1j46g *ners 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 sqq90xerw3fbrg rf a6 1 -4j6ot*svjlm(uare.

  Consider a square which is 1.0 m on a side. Charges are placed at-w97s8 x joxzt*xtt yj0kjx, ( the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1,jk-ojt ,t0txxx sx7*9z8yj w( 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 sfe rjoszmd1 -5z e//v9k0(ygof 5.0 mC when it is placed in a uniform electric fisovg1 ym-e5zd9jke s0 r//zf( eld. What is the magnitude of this electric field?

  A particle with a cha0*4toggc ud8brge of 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 0.120 g is placed in an electric field of 6000 N/C ;a( bgytt1:bkij:un bin4:0v. th9zlpointing downward. What charge must be placed 1:t tazbg :ibji9n4l;. t(:0vb hu yknon the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball qh3 ix-bf9i4pj olo2;is placed inside a uniform electric field, anjix3h;pfo92b4-ioq l d is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge rt zr s s,;btbp:c8*o0of +2.0 mC. What is the magnitude of thet; *sbcrt8zr0s o,b:p electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the electrid1z0dfhu q2.peelk6 q *rhr,3c field 6.0 cm from the ceu r2*epe lr6f.q hk1zd ,qd0h3nter of the sphere?