State the law of conservation of electric charlf)bd4zmr : s q)k,n:kn +eo6oge.

  Is it possible for two negative charges to attract each ot85 qsocvr67sxher?

  Is it possible for a positive and a nrwvz52s;m1*)folegv egative charge to attract each other?

  A glass rod is rubbed with ubp;2g w1 nv,pa piece of silk. During the process the glass rod acquires a positive charge and,u2pvnw ;1bpg the silk

  A proton carries a

  The model of the atom shotkjc l 8.2w:,k0chbxd ws a

  A neutral atom always haslchzi )f8t, /g8nkac,

  An atom has more electronw: dg7y gqj ;/mj;nfl0s than protons. The atom is

  Materials in which the electrons are bound e+ bl/ ugfl;dfdrs,yg66 w*(kvery tightly to the nuclei are referrel66ur g d(fs+/y, efdgbk w;*ld to as

  Materials in which the electrons arer:( e)dtqbm:c bound very loosely to the nuclei and can move about freely within the material are referred :q: ()rbdmcteto as

  A negatively charged rod is brought near one end of an u; yye po6)vfp+)r 6yklncharged metal bar. The endrp6 yefkl ypv+o;) y)6 of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive c freh ;+jgvv h+qvu 3 xi4c)xlu03j vw*2j2c4jharge, and sphere B is neutral. They are placed near each otherl+2chx0ve vhxv 43jrgwu); fq+2 iu v3j*jcj4 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 electroscope po/bz fzn-l/ p.pkq/ bp+ .bdozu .n5ch0sitively?

  An originally neutral electd,p- vjg +sk7troscope is briefly touched with a positively charged glass rod.vd,+7tjpsk -g The electroscope

  An originally neutral electroscope is groundzout5n wzq7 75ed briefly while a positively charged glass rod is held near it. After the glass r7q zo7wz n5tu5od is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves se g8-zb4jj a rwu5f9a4oparate. Then a negative object is brought near the electroscope, but does not touch it. What happjg9u j5w4o- afb48zar ens to the leaves?

  A large negatively charged object is placed on an aax k7am/6k8binsulated 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 toub68k aa7x kma/ch 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 80mdd8(c 5ytu/f un,(jzneat the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a /rg c,n7mai elv j.ttc 6+5nm7distance d. The first charge is larger in magnitude than the se /7ig j+, ac nmr5t7.6lmcvnetcond charge.

  Sphere A carries a net charge and sphere B is neutral. Thenofat 9s4 vxmq:3et 4ojc. )i/y are placed near each other on an insulated table. Which statema v x 4s4)/oettiq9:.nmfjo3 cent best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the chav+ln/6i 8d*x p f8qgzprges on both objects are doubled wip+8l* vgpzinf/x8q d6th no change in separation, the force between them

  Two charges are separated byua-3 st, p hvbgc)9)av a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual forces?cs,u3-v abtvp9h a)g)

  Two charged objects attract each other with a force F. What happens olx0 nj2-mwy2a7y ;xeto 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 value? T xy2n m;xely7j w02oa-he force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. Wha2uogjg h,mkf(gt u:3) t happens to the magnitude o(:u3,gjg ghou2mt) fk f the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happ/t7:j;g2y szhv pckn;:.f jmoens to the magnitude of the force on the first electron if a second elec h:vpmj7: ;2/csokzjgtn .f; ytron is placed next to the proton?

  An electron and a proton are separated by a di quh jws2o.c :y:hgzh95cj17istance of 1.0 m. What happens to the size of the force on the proton if the elect c ch.j5zj:uwiq9ysh:go7h2 1 ron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed fed uxn/w0l-+ f9f/v y+jvx-qjz3q :tat 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 act+jwqdv/-f yz:3tqn0x-/ f+f x9l j euvs 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 triangle. Whq vgk ou 1hi*t;,vf+8hen 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 for1vfk,8g hit;h o+vq*uce 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 nbb8y(ha) ip6vny y/n/ ot a vector?

  At twice the distance from a point charge, wizf(g(+./+ x fwku(fglhd (c+li*jlthe strength of the electric field

  Is it possible to have a zero ,a7 )n qd-pu jwcx4h:* whp7srelectric field value between a negative and positive charge along the line joining the twop*cwjs:)-7hph unqx4aw7, d r charges?

  Is it possible to have a zero electric fil*kpr9fukb g)9 .)acpeld value between two positive charges along the line joining tuk* 9f9c) .lakr)ppgb he two charges?

  Electric field lines near psitive point56a cxvd.xow3c ne35xxa i20( dkspe6 charges

  The electric field showb sqls. ,6hh 09-eflvkn

  Can electric field lines intersect in free spacjm 668eh( wjsue?

  A solid block of metal in electrostatic e oq4rm,f() z 4dnerkl7quilibrium is placed in a uniform electric field. Give a statement con7d q),rm (r4l4n zfeokcerning the electric field in the block's interior.

  If a solid metal sphere and d+ utg/2 i*.9tireuhe a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the sutetgd+2/ *iu. 9i reuhrface is

  A cubic block of aluminum 7h5l)l4ys zzj rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charjz 745hlsly z)ge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electriccbw xwmc*mkz95( s9;h charge

  A positive point charge is enclosed in a hollow metal cqs j)/x09nlglic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above theg lx)jc0/n9sq hollow sphere has

State three properties of conductors idh f/h7 2phs x2sx i81rhkxdh(c,1w8zn static equilibrium.

State Gauss's law.

  The charge carried by one electron is wj(,z h izgb95l9aos/ $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net charge of +2.i/zzh/ 9akjkom34 xdg;)i l;g 00 mC. How many more protons than electrons dm9h;odz/z ;i l43g/ kkgaj )ixoes this piece of plastic have?

  What is the charge on 1 kg oib -glp3wg 3j3f protons?

  An atomic nucleus has a chazrzjgt uc wy+c-0 s71;rge 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 6m*6:jj sjl i( -9odz zi+ts nna7z/aqof 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force betwea 7s9z* saiil6oj zn(+z6qj dnj-/:mten them?

  A 1.0-C charge is 15 m from a second charge, and the force betjt ins(jn05i be8(l:cween them is 1.0 N. What is the magnit nijj(85i(:sl0ecn tb ude of the second charge?

  Two 1.0-C charges have a force between them of 18 a0peg fqr:29nx7peu.0 N. How far apart are they?

  The force between a +u8a j4.axgts4cvh ehlb nu83j:go 33$30 \; mC$ 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 force. If tcb0opr 1ay;g 2hey are moved to a new separation of 8.0 cm, wbcy p2 ;a10grohat is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the xly)w1252r jdt g8szde -axis. The first charge is at the origin, the second to the right at x gtl y12de2sjdw 8r5z)= 50 cm, 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 +2.0 mC is place 5x m.yr3f+p55moysl;r elz 4cd at t oeryrz plf4cm535s;l5+xm.yhe 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 acts on the charge at the origin?

  Three point charges are located at grd1j: nde 7+wthe following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.n+gj1r:7 dedw00 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 is placed at the center of a square.no.+xuyp8uoa64qnm , and a second point charge of -Q is placed at the upper-left corner. 6 +q pu8.nyoanuom.4x 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 the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (al5*n awx uw8)0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of)u *w85lxwaan 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 (0, 0.5 utugh /(0c4 ag14c o:elxjfr10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net fora5( u4ur 1lx 4 hcftgc0g:joe/ce on the 5.0 nC charge?

  Three identical charges of 3.0 m d)j-uw 6z7cfyc27 bsyyy e.q-C are placed at the vertices of an equilateral triangle which measures 30 cm oncy ) ed-uzb.y7s -j6w qfy2y7c a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point chargesc2ka * vr v+iwky0s0.u of +Q and +4Q, which 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 that the electrostatic force acting on it would u.wiysv+akr0k 20c*v be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is wd ms8eoz-fay4/a; 2lat x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is w 2a om/af4d-e; ysl8zzero?

  Charge +2q is placed at the origin ahwd7 *gh56mkpneev(6psy ;6s nd charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it iw e p s6s 6ge5h7p;d(vyn*6hkms zero?

  A copper penny has a mass of 3.0 g. A totfzs2n n c*7sy,al 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 attrac, yq2wu:bjg5 ttion of a fixed proton some distance above it. How far above the electron is :gq ,ubty2w5jthe proton?

  Two 0.20-g metal spheres are hung from a common point by m wp38z-iry++b sfn*embs +-m nonconducting threads which are 30 cm lopnsb-e83w r+ m-zmf+ m+iby* sng. 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. What is the magnitude of tu;x rn)04b8-axlktw.ty o q+ she electric field at a distance of 1.0 m from th wr-nk0lt;)oxu.xsya8t4 bq +e nucleus?

  What are the magnitude a6ez*w-m*30q tp ndymond direction of the electric field at a distance of 1.50 m from a 500ymzt6qm* d*p 3on-ew .0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude o ,s t4ilc6z0qhx:mn (nf the electric field at the location of th(m 6i0xl4n cz th:nq,se test charge?

  A 5.0-C charge is 10 m from a (xw lr(x,s5n s jp3 -z)zf6owcsmall test charge. What is the direction of the electric-5o(z3szrlpf)xj 6 n wxc (sw, field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnit raji rbuzx*a+;l,n 5,ude of the force experienced by a 1.0 nC chargu za5,ar+j*xln,ir ;be placed at the location of the test charge?

  Two point charges eao2v)) *e -fc(mb /x)wqqqdrou ch have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between the two chu(2-cfox*)ebm)/qr qv odq)warges?

  A 5.0-mC charge is placed at the 0 cm;b-cz0 sla7w a mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric fieldcwl0 ;z abs-7a at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter sti mwdd u9*gqn-a5l3h g1ck and a -4.0 mC charge is placedggnl91q hw5a-m3du d * at the 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of y erf 85 87ade,dzfzn3+3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the8ynde8efr5a7 dzz3 ,f electric field at the point midway between them?

  Three 3.0 mC charges are at the three c d*w1x 2h57grm/z)x i2 bicqxnorners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the elez i2r1)xih g5mqbcnxd72w*x /ctric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges a- (rbqzddf (o/re placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC af(zdqd(ob / r-t (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 kpdq+u b*hpb d )y6mchl.u1ic:.v(*p of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this electric f pc.c+ 6hvmq1*ih *udp)p:lku b(dy.bield?

  A particle with a charge of 4.ckl 6jejldtop 77;y 7+hezj 9p0)wt -m0 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 fiel. tux uyvk+ g/(47zkzsd of 6000 N/C pointing downward. What charge must be pla(k+ 4yv7tz.uz sx/kg uced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 n t/v9f0enb qt5 (.lj2wgip0oe C. The ball is placed inside a uniform electric field, and is suspended against the force of grav/npel( qitgj 25 ow0t bf0v.e9ity. 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 therm qta.(.3 wlt1w 8zs-g:a3bqx0qpwf magnitude of the electric field 58t (qf -bwa0rpm3 gsa 1qlq w3zx:t..w.0 cm from the sphere's surface?

  A metal sphere of rad vurd;y),wd(cius 2.0 cm carries a charge of 3.0 mC. What is the electric field d)u;wr,dv c(y6.0 cm from the center of the sphere?