State the law of coni1i0n a iw(dua8q nm,5servation of electric charge.

  Is it possible for two negative charges to attract++trl am0sah 7 each other?

  Is it possible for a positive and a negative charge to attract each othfod4 f3em/a 9v op02frer?

  A glass rod is rubbed with a pieclh;,mhb g x;8ue qk1:pe of silk. During the process the glass rod acquires a posieb;lux; 1khpq:m h,g8tive charge and the silk

  A proton carries a

  The model of the atom shows 4hatp.bm77a7 ao2p+ c) rxljpa

  A neutral atom always0 -f -zm-bucsk-kyjw1 has

  An atom has more elecn: d tvb7y wt)5wv;re7trons than protons. The atom is

  Materials in which the electrons are bound vevfj(r7xjd0ybwesp 0 :w u:*h-ry tightly to the nuclei are referred to 7bj:0duyxj ewhw-v 0:fs*p(r as

  Materials in which the electro* lcb1.4 a*o x0mjordoti +lq7ns are bound very loosely to the nuclei and can move about freely within the majo0o.a d 1*bm+iol7*lt4cqxrterial are referred to as

  A negatively charged rod is broughlu 3c/j:wkje1juge51;fow liet;n/9 ./naq nt near one end of an uncharged metal bar. The end of the metal bar farthest5 j u/:.giflw nnjeckl9w/3;oej 1e/qu1 atn; from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B isg5u1 nm5zgueexo 0 11y neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is g5x51ee z1 10gmuynuo grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positivel2 tca9/.qtyqac3 6,b jj)lpmly?

  An originally neutral electroscope is briefly touched with a positively charged kg4jx;yv)ge r b47wi72) / zu9ovlmkgglass rod. The elecile9ug)o jm/2bk477r) yv4g;vwgzkx troscope

  An originally neutral electroscop/yj)mtzxshixdy);z) 9 8a8sge is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electrsa9z8m)xsyijy)/h z; 8)dtgxoscope

  A positive object touches a neutral electroscozone v5+f:tyriaua jqp )x2m z3m 3:;8pe, and the leaves separate. Then a negative object is brought near the electroscope, but doo8n fau:3pvyq r m m+tj52a:xi); 3zezes not touch it. What happens to the leaves?

  A large negatively charged object inm00:eu -j4xu j6fdt hs 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 negaux f:mue06 d0jhtjn4 -tive object. What is the final charge on each ball?

  Charge is

  What are the units ob-r3ccbl7 w5 kz wj22df the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. m -yqb01sp38jauj/ndrl m2-s The first charge is larger in magnitudr- umsaj12y03pq d /b lm8js-ne than the second charge.

  Sphere A carries a net charge and sphere B is neutawm:zc)+8is .lv nu3g ral. They are placed near each other on an insulated .+va3cgz: u)nwlms8 itable. Which statement best describes the electrostatic force between them?

  Two charged objects attract each *1tuee7nb1qqbsd3)tother with a certain force. If the charges on both objects are doubled with no change in separation, the force17qqedusbe3 t 1nt)*b between them

  Two charges are separated by a distance d and exert mu.tw 7boojbj3 -jl4l9stual attractive forces of F o-oj 4jtj.lbb97 o wsl3n each other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other wit n. t rr: *lx06nm7f -fz6ippb(x0mwfjh a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one-fourth its original(pn6 r -7jbpmzi6xfxfl:.0r fm t0n w* value? The force is now equal to

  An electron and a proton are separ3 oci,ua/ei t* tyg*v3ated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first el3uag t *eiity ,oc*3/vectron?

  An electron and a proton are separated by ore:h s(otbbv0w5sx 26 /u0hj(onyt(a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to the prose r wo hy0hu2(b:(/v sot(j05otx6bnton?

  An electron and a proton are separated by a distance of 1.0 m. What h* oq/ ii*.m pj.m6xg;gdne *lkappens to the size of the force on the proton if the electron is moved 0.50 m closer to the proton;/kl *x gii.o* *ged6.nmjmqp ?

  A point charge of +Q1.q03mz53(qs na /a (r:jv ozdozlr zd is placed at the center of 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 N acts on the positive charge at the square's center. Now, identical charges of -Q are pla3qr(j3(lod 5zoaaq/0r zs 1vd znz .m:ced 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 triangle. Whenjw gn /c.ovm:6uo6y *oactt,( a second charge of +Q is placed at one of the triangj(to6c vwm.gcu o 6oay:,*t /nle'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 charge of +Q placed at one of the other vertices?

  Which of the followingnx brot 02r8br;ql589 e;,5v ddzv gbv is not a vector?

  At twice the distance from a point chvtx yu ;gxi p bw:5r2:y.1y5q c7kixw4arge, the strength of the electric field

  Is it possible to have a zero electric fielcbk .,d pkq3vl8.4ddfd value between a negative and positive d8l,v d pk3bfdcqk.4.charge along the line joining the two charges?

  Is it possible to have a zero electric -n+ z5luzf0 ddfield value between two positive charges along the line joining the two charges?d-zl5u f+0 nzd

  Electric field lines near psitio vkwahi3d i q.k3(l91 /jz0m46 rpqkjve point charges

  The electric field shl r2ujm:)r(*x n;yjkzown

  Can electric field lines intersect inr (+j3f7j dent free space?

  A solid block of metal in electrostatic equilibrium is plaxs:wx p du;0od62a-8tyzw1 us ced in a uniform electric field. Give a statement concerning the elew oxz- 2ta8x1 sd0d u:p;yus6wctric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each gi)t lz f,b1so-iven the same charge, the electric field (Eot fi)-ls,1 zb) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform,: y inymy8w.d qtyxf,e3v6b: electric field is directed straight upward. What can be said concerning the chabf: .eyi63nmyy8 xy ,,vwd:tq rge on the block's top surface?

  If a conductor is in electrostatic eqx9g* : hpb3pgsx )qs albq8pyxub* 2-*uilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic xa,3ubgt;rkvqs *9b9 sphere that is grounded. bab txr39u s9,;gk vq* As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of condu ae rq/)j6kd1uctors in static equilibrium.

State Gauss's law.

  The charge carried byj hox hkzh:w *x0l:a6mrv )*d1 one 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 has dbnp(w y/7e .cx+t ep*a net charge of +2.00 mC. How many more protons than electrons does this piece of py/e(xpe * ctw.bn+d7 plastic have?

  What is the charge on 1 kgej6h,uu7 v 3m yc wh8rhueg(/) of protons?

  An atomic nucleus has a charge o5*dvjdp3pj8 pf $+40e$. 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 chargfr f40qvmgi 3sj8x n79di;,pbe values of 2.0 and -4.0 mC, respectively. What is the m nf8xpfsg4ij0 ,q i3dmbv7r;9 agnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge,b; bj u,aos-o7 and the force between them is 1.0 N. What is the magnit,osu-j;b7o abude of the second charge?

  Two 1.0-C charges have a force between them w l7dot(bg68ei:*bwb;yk / va of 1.0 N. How far apart are they?

  The force between a .tmt8 yxdijk7 s*p3h9 $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experiencey-.j -4qhp. r zne(05uwtqh vm a 1.0-N force. If they are moved to a new separation .w hne-.vrm5y hqzp -uq0 (tj4of 8.0 cm, what is the electric force between them?

  Three identical point charges l**);j pcv8wottuh6gof 2.0 mC are 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 are thej;tp8l * gcwo)h6* vtu magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on thapai x fe,to.kd7z* v48nda7:e x-axis. 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 tvpxi, f :4dzn7tea8a.k7d*aohe magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following -f1bycy 59 loapositions: 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 c1a-9oylyfb 5 the force on the 3.00-mC charge?

  A point charge of +Q is pat( e11uw9zj1kuah yw2ch 2t *laced at the center of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic fc(ahuzwjy k1tw12ua1et2h 9*orce 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)n(cgia,cqy9l7 ws /6u; Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitu/c6ycsi na(w,ql9 7g ude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at ((,l z/.c5epw xophgd+ 0, 0.10 m); Q3 = 5.0 nC is atcgx olz e5w.(/h p,p+d (0, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices ofec lq+xhu pxt,:o51k7 an equilateral triangle which measures 30 cm on a side. What is the+5ehq x kcut7 1opl:x, magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, whic:8ppkn igv 1k8h are separated 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 thatgikn8 1vk:p p8 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 at x = 4.0 m. Where on 45d ,+u1 jthfzb qzq(gthe x-axis can a third charge be placed so the neqh4 +q,u 1(gjzfbz5t dt force on it is zero?

  Charge +2q is placed atfvbee-)uo/2 y the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be ploy2f e)vube- /aced so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A total ut(e(igh4/ cgr2l+ mzof $4.0 \times 10^{12} \; electrons$ 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 gravity by the attract(4 qoalu h) gb/4auc(oz6f,m kion of a fixed proton some distance above it. How farl,6f oa(c4 muz4(khbo)g /uqa above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by noncondu ;gqze 2nlzz a(tpjt,cd1x .+:cting threads which are 30 cm .t,nj (pe; +2z:gqx1zat lcdzlong. Both are given identical charges, 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 charge of +40e. a8)k6v (9drudh t,mhqWhat is the magnitude of the electric field at a d dr)8hu va9,(6 dtqhkmistance of 1.0 m from the nucleus?

  What are the magnitude and vsip hv* u;xv*5/:.t7l vyly sa4rz9t direction of the electric field at a distance of 1.50 m from a 50.0-nC xtaiv *spv7 .luz yl5hv/*:4s yv 9t;r charge?

  A 5.0-C charge is 10 m from a small tesb xcfu exgpn4.p yr51d:n.y79t charge. What is the magnitude of the electric field at the location of thep9pnnxyy5cr .guf d 7ex:b.14 test charge?

  A 5.0-C charge is 10 m from a small testurj8d)hzq o m1xq)4nfm/ 8se3,t 9 uas charge. What is the direction of the electridx h)8tmqn)14o8 jmfrs, zua euqs3/ 9c field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of thej i lzad7 duqp)7etfl9;w(:3 cm,fu.t force experienced by a 1.0 nC cht.d( :qfju3,p fe9 zdu77t) wmcail;large placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distan15 wsbbn., r4*awwo ycce of 4.0 m. What is the electric field at a point midway between n.woc,b 1swb4y*5war the two charges?

  A 5.0-mC charge is placed at the 0 cm/fa7d/ xt5pb0:gnfkj8 8 kp6vaxtb n0 mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm jxf5bb kd pa7n/t0g k80xf/n:6 vt8pamark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and y3if9 ss a+h*dwr0x*w a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joinindrs3 i90 shf +wy*xwa*g the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.jadjhfpv 56..(htmfe 9/;uvh0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at t( jap/dhhv.; tmf .e659fhjuv he point midway between them?

  Three 3.0 mC charges are at the thyypy*s u(4+-t4o btc :w :atd5nswq4bree corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric fields : + a44obtuw nq-scp:y45t (ybwd*yt at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placedr8kft jo,;c k2 at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC afj ot r,k28;ckt (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 placed in a unifor 9w3,tx jmr3l ls*,lyrm electric field. Whasmlrjy33t xl*9r , l,wt is the magnitude of this electric field?

  A particle with a char v4bi,f7swmovia-h 5c (r;l)s ge 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 9z a(ft0fv5i -l;/(yw idg apo:ieeo-placed in an electric field of 6000 N/C pointing :wp -t ef i-ao(l(y;eag v z9/05iidfodownward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placed qt 2c.v9pu: el7nzl+6 ydvbd3inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric fielyvzcudn 9+6:el. dv2b 7ltq3pd?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What a6*u.jf(.p qua6n kg gis the magnitude of the electric field 5.0 cm from uq6nju.p.kaf ag6* g(the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charged s,cnau2m*1fd(xh-(e)7gp,i eqbys 6m oc(v of 3.0 mC. What is the electric field 6.0 cm from the center of the sphee,*bdpn(g7 xmhd-(co2 cuq) ss6(a1ef v i y,mre?