State the law of conservlm a82crc 8hly*+xq c8ation of electric charge.

  Is it possible for two negative char mk ((fn:-;gmzas kr-)fj50h w4 qjezwges to attract each other?

  Is it possible for a positive and a negative charge to attract x.r5x+tjw8.k f *ti g9lxju/m each other?

  A glass rod is rubbed witxj//u.b; zx fy9 sjh7qh a piece of silk. During the process the glass rod acquib;/h 9ufsqzx/yj.j7x res a positive charge and the silk

  A proton carries a

  The model of the atom showcb dxf1: im. d+.iklf9ny5gj(s a

  A neutral atom always hasyu j40 ;gn,yuwms/6s6(eji pc

  An atom has more elecntd; zl:4 9gghtrons than protons. The atom is

  Materials in which the electrons are bvc1gmsdz)tensg* :qr 3y;6jc(g1 ;alound very tightly to the nuclei are referred e:s*r13tg;lgcg)ca nqy;vzsjd m1(6 to as

  Materials in which the electrons are bound very loosely tot 13lpsa2*u:+ os ixew the nuclei and can move about freely within the material as i2pael 1*xw3+:uost re referred to as

  A negatively charged rod is brought near onvz5 *jh; yos9oe end of an uncharged metal bar. The end of the metal bar farthest from the charged rod wz;hv 9os y*5joill be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are plxn 1q4s9k s:pzkblyj83/kw -mag1n g+aced near each other agknkps+m:4gwk8qxly19 1 s -n/ 3jzb 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 chs1kbah 3sd j(5arge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively chaqq;kpaboo:l1 w+3 rn3 rged glass rod. The elapow qr33n1+b ;l:qokectroscope

  An originally neutraxm bn pq, om (jy /zbr)j)h6pq;s2af-1l electroscope is grounded briefly while a positively charged glass rod is held near it. After the glassb zjofq1q m/,pxa)bym -j(ph2)n;rs6 rod is removed, the electroscope

  A positive object touches at l 4gzoj1vj6/ neutral electroscope, and the leaves separate. Then a negative object is brought near logjj4/ v t6z1the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulatzz,)hp0p 1r: iid,azft1g. tred 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 doeh.1 , z)fd1r:0,tapg tzpizir s not touch the negative object. At no time does either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of 1s0gnxl qyp3 9 f)pd) 6vf4amjthe Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separa8nmgscyq 1 )gnlm)k *3w+dkvn 7nq71r ted by a distance d. The first charge is larger in magnitude thanqwg ms 7 k+yln3kdn7)*qr)1cm8gn v1n the second charge.

  Sphere A carries a ngxvn(xnz:(0bp) vh, dz,rrqq;)z 9nf et charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic forc,q ;z :n 9g)nzxp,dzx0(v(hn fqvb)rre between them?

  Two charged objects attract each other with a certain force. If the chargesv*v ehmurfs f(nxti7)f,34c5 , vn;kn on both objects are doubled ,4i,fnf3 5sex(t mnn ;cvvfhv*u) kr7with no change in separation, the force between them

  Two charges are separated by a distahp +u(fv3 evb:nce d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, wha :p ue+fbhvv(3t are the new mutual forces?

  Two charged objects attract eab)1rfpnpt ,f.ch other with 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 r,p )1 pfnf.btreduced to one-fourth its original value? The force is now equal to

  An electron and a prote +t1 4b*kkl(k9gufa9fo yu6 oon are separated by a distance of 1.0 m. What happens to the magnitude of the forcb9ty ofk ku *6u(o9eklf1ga +4e on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distl-- k8vzk *panance of 1.0 m. What happens to the magnitude of the nzp-v-a*k 8lkforce on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separats/-( wt9 pdaxmed by a distance of 1.0 m. What happens to the size of xw/spmt -9d( athe force on the proton 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 sec z,0gj x2uv5boond 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 placed at the other three cornerb,o0v u2g5 zjxs 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 centbn *g0gq ya0j7roid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's v0 *bn qgj7a0ygertices, 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 following is n7llq* wblpxo, e. p,x6ot a vector?

  At twice the distance from a point charge, the streng. ytvl63t)emdu k(fa :th of the electric field

  Is it possible to have a zero electric field valu(rh(dtv 2)btve between a negative and positive charge along the line vv)b d(rh(t2 tjoining the two charges?

  Is it possible to have a zero elecho(x(8 f/snw qtric field value between two positive charges along the line joining the t8qx/(nos( hwfwo charges?

  Electric field lines nee5jh r50vbv fj 8jy5cdjus5 v2: 8+vbpar psitive point charges

  The electric field shozl-i+lj3 b8ad wn

  Can electric field lines intersect in free spacz ix :es ruuzuu;x c.7*5v210:xjf r a5ah;xrie?

  A solid block of metal in electrostatic equilibriu l o/1c8pl on,y-/yvwb zc.e:zm is placed in a uniform electric filzy8 ne1l:o/ozc,bvc- p.w/ yeld. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow mhjwv+)3 y 5ofhetal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surface ih j3wo f+5)vhys

  A cubic block of aluminum rests7p efn1mgdb6t 6y.+oz on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the char6mpb7 eng .z d1ft6yo+ge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric cha;azxwph vpg(xxj zo d1iy ., 61;dvbnv8+s)r 7rge

  A positive point charge is enclosed in a hollow metall0c:p( gx:gv p20ct(vj-ce f fuic sphere that is grounded. As compxp fe:gc:(vtc0-(cpv0 g2u jf ared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of con:vmmv( c8tzu hbtemw ,3,:.h oductors in static equilibrium.

State Gauss's law.

  The charge carried by one el/p1swt:yia 6 / 2hfeptectron 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 of +2fcp5 d 7+nndk1.00 mC. How many more protons than electrons does this piece of plastic hncnk f15p7dd+ave?

  What is the charge on 1 kg of proto-y )m7jq) i3yluu,p yyns?

  An atomic nucleus has a che xf/ r jdhx1:01 wh:jzu 98pmo1l(ggwarge 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 charge values of 2.0 and -4.0)w: l11espj(di d9qv m mC, respectively. What is the magnitudelq:d1 sw(v)jmdp19ei of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, d4jd/mg1h9 pp and the force between them is 1.0 N. What is the magnitude of th dp dmg9hj/14pe second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart aremsv yk:ud42zchx 3 ekc*+a(5u they?

  The force between a ezmvyu.we--zh l) v:7 $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, iniwlj1w3+ vfvy.i.7(voa)qt uv tially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force betw3 v+ q1v )via7.u.v(towfw yljeen them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The4nv3,uhykylo: ig4b8;o j4qj6hv n - b first charge is at the origin, the second to the right at x = 50 cvb6: v3n h ;o8i4y4yl-g k,obq4jjunhm, and the third is 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 placed on the x-axis. A charge of +2jn juhx;9t0fb 9w.s0jv)mflcc z0 tyc53e;8s .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 magnitude yf90e;zu j 09fcw nbc txt35m)lj.s80jh;svcand direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located a+(: qibiyeis )t 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 = -1.0) +iis :y(ebqi0 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the cei+h04t3 qrql5p di*;rl,+l8 tp u bygy 4zvh.knter of a square, and 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 magn 0lvqpy 3.r*t+i dyhl+pbg;5 8, ukr4 lhtqzi4itude 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 b :e8uu,*q s4 usgvo8( r:ubngz27khQ2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Whatue r:*4 bq s87z:o2h n(8ungbksvuug, is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 =a *z/v)khp zk2 n+t),j2ayc rz -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What akhr k nj2,/y*)z 2tza+zcpv) is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at vw 9dcm) r/t0k8bm g cpbn336othe vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts w9d po3cg 6m/rct0 vbm3) nk8bon any one of the charges?

  Consider point charges of +Q and +4Q, which areu+owxor2 fjay )9e8)m 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 t o+yo 98um jw2exf)r)ahat the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-Cwv )s0bl+c,x *tlc h7d charge is at x = 4.0 m. Where on the x-axis can a t,th)0sv 7w+*lc bxc ldhird charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is pla+9 58 s tynvcd6tkdqs6ced at x = 2a. Where can a third positive charge +q be placed so that the force on ids668 5yvdscktnt9+ q t is zero?

  A copper penny has a mass of 3.0 g.*qr)y lz08xn nxmr8 y- 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 up against the force of 1ob/2m x8 :frq5njlf82fonaw gravity by the attraction of a fixed proton some distance above it. How far above the electron is txoo8jfn2q 5wam/:b8n2f f1 lrhe proton?

  Two 0.20-g metal spheres are hung from a common point by noncon )5v)t1rs2ug.bnzps ycx w6yke m*r49ducting threads which are 30 cm long. Both are given identical charges, and the electrostati)cy 14x2rmt6 er* wy5sskugzvp9b) n.c 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. What is the magnitude ofwb 0g dlc;v 9lfpp24s1 the electric field at a distance osd v9clgw2f04pb p1;l f 1.0 m from the nucleus?

  What are the magnitude and directiogx( wk/d 0wd :jfit)uiq k/36jn of the electric field at a distance of 1.50 m from a 5dkwi/ 0(tkq )jf3:/xidgu 6w j0.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. tueykw 5d sj ,sj-x5id z9n*u02(ti h1What is the magnitude of the electric field at-j t 5kui0 (12nwxhjsdts9ei,*uzy d5 the location of the test charge?

  A 5.0-C charge is 10 m from a smln -m 1ynn 2o1zyj4d c:f1vykaty:t 93all test charge. What is the direction of the electric field34ykn tlvy::-112yj yn 91zc ontdamf?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude s*3y jo((ksc e bw:/4wr)pkaaof the force experienced by a 1.0 nC charge plk: os(ryw /(sc)aebpj a*wk34aced at the location of the test charge?

  Two point charges each have a value of 3.0 C and ar-hs5 igv38+ /ypvd wtqe separated by a distance of 4.0 m. What is the electric field at a point midway between the two chadpg 3+8t/ ihw-qsyvv5 rges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.bs25-*gbf sipy;ir b5 2i*x jf0 mC charge is plac 5fi-jb52rfybx* ss *b2 gi;iped 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 meter stick and a -4.0 mo 2ak oy*rr5n4C charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric 42roaor 5ny*k field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0w,q;(9u /knp1thjadgl+ 1 t i+dtu.fc and x = 0.20 m. What ist1iu9 j hcnut,k+wt;fla/1g(p dd.q+ the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a squagt2 g:v:9v3-x aqcxyvre of side 0.50 m. The last corner is occupied by a -3.0 mC chav9 cvygaq x-t:32v gx:rge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are plaek3hbi-a1ey/ ced at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1, 0); -3.0 mC at (0, 13y1e/ekaib h-). 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 whenc kpgr;9f rsoj/r 0fr-:,b cq. it is placed in a uniform electric field. What ipj;rsqkcg0,r 9:or-f frb.c /s the magnitude of this electric field?

  A particle with a ch2 9ymu m 4(q2;mtttecearge 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 Nvx4a, vy( x0hr/C pointing downward. y(avxr04, hv xWhat charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.0v,fja9-v/rmee 3rlw5 fdo(( u0 nC. The ball is placed insifjev / f, vmar(do(3w-r u95elde a uniform electric field, and 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 of +2.0 mC.x/+npsvj6:b u What is the magnitude of the electric fiel p js:x/v6u+bnd 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries k 6amm;9yzbl9dqd(nv 7 :qe5da charge of 3.0 mC. What is the electric field 6.0 cm q(en bmq9 9ydm 6:;al5dk7zvdfrom the center of the sphere?