State the law of conwdy 50 pjca x2j(5xi*vservation of electric charge.

  Is it possible for two negative chargeio1.xhg5 5 wrjs to attract each other?

  Is it possible for a positive a n+.dztn gd.1ynd a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glaq0nr s8(6ozl)ggd i0tss rod acquires a positive chargzs6 0og 8n()tdqirl0 ge and the silk

  A proton carries a

  The model of the atom showz (mlgan1-ul( s a

  A neutral atom always hasa8:.yz3r+bheh zh7s p:yh huf8n4*)dno pr 3y

  An atom has more electroy3nheu(jrenhe:5 1 / ons than protons. The atom is

  Materials in which the electrojdsdo b tqj(b8 4c82+ace(l1gns are bound very tightly to the nuclei are referrec48(b (a8 bs oqcl gjjdtd12e+d to as

  Materials in which the electrons are boundhrx0;x)zm,n1r cfz a;wzgo7t/ 7 2df t very loosely to the nuclei and can move about freely within the material are referrng;wz zxfd21 ;x,m0)t /htrz77cfaor ed to as

  A negatively charged ro ad4.s;u0k 0uex/lzrh wj2)vcr6 q3urd is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the cu u3erhr2dxa; k6v00cz wulr4./ j)sqharged rod will be charged

  Sphere A carries a net positive charge, and spei) 58j3 trryfmovg( 9here B is neutral. They are placed near each othf)tr3yvg 5o8i(rj em 9er 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 charge an electrh:zzzu7 h( 9tv+6pi(tooax. n oscope positively?

  An originally neutral electroscop01;ixw ww7 mbaf5a9sl e is briefly touched with a positively charged glass f 0lmxs ;aaw57iww1b9rod. The electroscope

  An originally neutral electroscope is grounded boi. hfk*/w2r*k r6y el g:+izrriefly while a positively charged glass rod is held near it. After the glass rod yw6gzkri* .o+r*/fek2rlh i:is removed, the electroscope

  A positive object touches a neutral electroscope, and the le) avgms8.w )xn4*3tn3yl.aexb,t o ap aves separate. Then a negative objectnvy* .msp3lea n8txtag4x,ab.)) 3w o is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged objs;mlp*o+uvb:ziz3e;m6jik mf3qz 4 -ect 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 alon6kum-z:3i +p;qsf;* ol v3 izmme4jbzg 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 negative object. What is the final charge on each ball?

  Charge is

  What are the units of theckq l4,)4hxvbb-mry ze :p( b; Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects ,rmo) ey2o9;f m9to.rsbo-c l are separated by a distance d. The first charge is larger in magnitude than the secon,c) t brolf9r;-yemmo 92o.o sd charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed ne+b*jj. /yo-fzrv7 o wxar each other on an insulated table. Which statement best describes the electro-bw ofjv .j7+ /yxrz*ostatic force between them?

  Two charged objects attract each other with a certain forcb2p8 ory 9oa xz+t8w.pe. If the charges on both objects are doubled with no change in separation, thex 8o+obp9yzap 28rwt . force between them

  Two charges are separat-bfwgh q)616 l six6rded by a distance d and exert mutual attractive forces of F on each other. If ths wq )16fgrx6lhid-6b e charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the fs;+w u 8 hphjn t2ioz14ud4/wy;;csve orce between them if one charge is doubled, the other charge is tripled, and the separation distance between their t+ hi/ c 4; o2hew4ypduwvj;su;n 81szcenters is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance o o-c*ct7-whu;eafi* k2wx7 o gf 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed ncg-uao*-iew hwk;xto f7c *27ext to the first electron?

  An electron and a proton are separayorkg4y7ax m2qc)l71 ted by a distance of 1.0 m. What happens to the magnitude of the force on the first ogk am17 42xrqyyc)l 7electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What9zyx-2 k:/sv b/;nk erp admr, happens to the size of the force on the proton if the electron is moye2x , bmarnk;kp-/9r: d/zsvved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a squat/y)4ukdf/bg*hsu s3f5dn 7 lre. 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 thety7dgh bdk)f5uu3*fs /4ns/ l 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 prf b.(2t gx5ni8p.vsqlaced at the centroid of an equilateral triangle. 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 chgs t 2q.pv(n8r.xbfi 5arge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is n*.c)oned 9 vp3llej7iot a vector?

  At twice the distance from a point charge, the strength of the zg,nnvc4x 0t6.m ypzojemjh4pfk-o) am;-/ /electric field

  Is it possible to have a zero electric field value ;*jxc2+ hj 4pa67tflt k4zkib between a negative and positive charge along thex2t;pljcihk *k 64j4z7baf t+ line joining the two charges?

  Is it possible to have a zero electric field value between tw+bc 8hbogdxisd;z-a b7ij;* tk8( w7zo positive charges along the line joini(-zc7sa8*+b;i8hib;jzb 7kxtg dd owng the two charges?

  Electric field lines near psitb l ys;89.mmdbive point charges

  The electric field shown c,1 mu*mopx6a

  Can electric field lines intersm4ly73nhswhasz6 -, otg9nk mjw 1: 3sect in free space?

  A solid block of metal in elec2x agh:8xv r419tkq 4/byrfs8 ;hzmfs trostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block'srq2vr8tx 4 z9g;:ass/bf1m yfh 4hx8k interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters ar id bprs9j/g).tv)+uue each given the same charge, the eutp)jb9i.v /grs)u +dlectric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform el 00fj 2ji;vva8a9l/ ykv +aksm/8hzbfectric field is directed straight upward. What can be said c ja9;y0f f8k /z/8slma haik+vv02bvjoncerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electricyhv ug j,:v+ 1u2tok(a charge

  A positive point charge is enclosed in a hollow metallic spherep k37e9c: d::q*ymyd0ilsyo t that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the holqy7esoi0*3 k:dy9y m:cdpt : llow sphere has

State three properties of conductor7q hiw xk2n7wy 5ku;5q5paxh 4s in static equilibrium.

State Gauss's law.

  The charge carried by one elect /+edaatd xjingec ge41i0*p- :i4 9oaron 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 vi6:kx4o7es w of +2.00 mC. How many more protons than electrons does 76o4eksi wv:x this piece of plastic have?

  What is the charge on 1 kg +)7zuom8cwe77lf9ohy5gr q u9 w(yitof protons?

  An atomic nucleus has a charge f vp07mwjvk+6 of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, segcgyme7, *y d1parated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between tegy*,1y 7cd mghem?

  A 1.0-C charge is 15 m from a second charge, and the force between th- q1gfts)rml 4em is 1.0 N. What is the magnitude of the secondstq-lgm1 r)4 f charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are they?wuz;s 6 dd75bi

  The force between a q4* uywyz88qz0 zji3x$30 \; mC$ 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-N o;w c346rv.snvbqv.vforce. If they are moved to a new separation of 8.0 cm, what is the electric forc ; rq6 bv.43wcnvs.vvoe between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. ntc t3d4 2 ynhy,q3dwa 3zfe4.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 the magnitayn hndy,fq3t3t. 2 z 4d3cw4eude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed onp-.)iujib i9 -h9)o 4grxa jia the 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 the magnitude and direction of the electrostatic force which x-)aioa4i phgjui .- b rji)99acts on the charge at the origin?

  Three point charges areac0yb*n tb )7i*w q9ji 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. a bcqt*iw i7yb 0)9jn*What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and apspf93 t ; m-npa2ang9 second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic forta m-; p9pnf9p n3asg2ce 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 = -1.0 n/ pcd 3-2ycibr9 xbo7yC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of t/bydixr 7cy2-o9b c 3phe net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.g*-snyn2cb q *zcd1uh8 x 56nz30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the directionz*nz y6hdcx1-5 cnb*gn q8u 2s of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed :4czj 2/ya* 4hcyju ckat the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the ele kyjuca2 cc:/*y4hzj4ctrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At what px15:kr nnp-g lc wf7b)oint, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic fl)f wp5n7xbg k1c:-rn orce 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 okm9rtl9lx14ux k fdn8e1)if /n the x-axis can a third charge be placed so the net fotuf/ kk xrnfd1x98 9i1e)4lm lrce on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Whey7.1qas;sti 9 yr2a:lm6zx m ere can a third positive charge +q be placed so that the forceeams;:2 rsax697yy tliq zm1 . on it is zero?

  A copper penny has axmz hlhztpg8.y-h+y- u64z.w mass of 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 up against the force of gravity by the attraction of a fixem:p(0 wai8m *wntl-dcdizl/v +sk/b 7d proton some distance above it. How -/il7 aw/nzispml+c *wm(k80dd bvt :far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point be 77;:rrp*oqdarzqny ( pp5u:y nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostat:5qeduzrrq:rap *(n7;y7o pp ic 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. go7htc6 )iuc :yl(b-eWhat is the magnitude of the electric field at a distance of 1.0 m from the n 7octci( -gh:u)yble6ucleus?

  What are the magnitude and direction of the electric field at a g7px jhp-4c7hf9m kd.distance of 1.50 m from a 5 h dm94p7-7.fkp hcjxg0.0-nC charge?

  A 5.0-C charge is 10 m from by+pv qf(.e -rc.mi vq3*e zc pj4/m2ga small test charge. What is the magnitude of the electric*3f.pey eq/bcvjqr 2zpvmg 4mc(-+.i field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction o5cqv3gw5 ;qxsf the electric field? v;wsgqx55q3 c

  A 5.0-C charge is 10 m from a small test charge. Whatey *y 6q7g:,x(ovnw tj is the magnitude of the for7: g tejny(q6wx,ov *yce experienced 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 sepaka ww b8j6pjy:zg /()urated by a distance of 4.0 m. Wh8jak w /z:(jygu)wp6bat is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter skl ov(ijxhp8w .)i0g+ tick and a -4.0 mC charge is placed at the 50 cm mark. What is the electrijvlw(ki0x8g)i.p ho+ c field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and ahp(+y, iwd9zk -4.0 mC charge is placed at the 50 cm mark. At what po, dk(hzwy+i9 pint 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 -;t;0jx gyzlfki7 ay9= 0 and x = 0.20 m. What is the magnitude of the electric fiel y0fgk a;il9-x ;zytj7d at the point midway between them?

  Three 3.0 mC charges are at the three cxl/ v 165aq yp.hc6nokorners of a square of side 0.50 m. The last corner is occupied by a -3.0 kq6n5p.xal/v h y1c6o mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are plac/- 6j f a5l- iz4kgzoddf5jb,ged at the corners of the square as follows: +4.0 mC at (0, 0); g zk4ig6 ,5d/-foba-jzfj l5d +4.0 mC at (1, 1); +3.0 mC at (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 uni k 7wuzwqm 5wl:k2cc0(form electricwcu0 (mw2lkz5k7:cq w field. What is the magnitude of this electric field?

  A particle with a charge of 4.0 sw iu.n4 nlv/8wv 7p7dmC 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 6000jghzvt,) w22q 8xg :obr/xnv3 N/C pointing dowo2,jzt 3hv:)nbqxw x gg8/2 vrnward. 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 8jpe hcw)+o 2iball is placed inside a uniform electric field, and is suspended against the force of gravity. What arepc+jh)82 wo ei the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the mamf, . nfml )i.)wzk:signitude of the electric field 5.0 cm from the sph.m,if.isw:)lk) m fznere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 5e 62u*lf. j1az7axxuz8ozd x 3.0 mC. What is the electric field 6.0 cm from the center of the sz aadx2fxzl 5uzo1u7 6.j*ex8phere?