State the law of conservation of electric .5swzvdnp ,k2dd, /lycharge.

  Is it possible for two negative charges td-9 u4kl:re la:3pqg5 m5qj2kol2xd wo attract each other?

  Is it possible for a positive and a negative charge to attrac1e2j,tszigb*q7 sj 1 kt each other?

  A glass rod is rubbed with a piece of silk. During the process ii+stprzgc ggpe.b2(yd53 +; the glass rod acqgcery+ ptiiggpz +s; .32(5 dbuires a positive charge and the silk

  A proton carries a

  The model of the atom s ycwz*(4w+eh0nd238f tjbco qhows a

  A neutral atom alwayen3qg: l3vqo k76 : ,ictw/hxss has

  An atom has more electrons than prhx2 h9i+9ni.old8v i qgk/c)9 s;mxen otons. The atom is

  Materials in which the electrons are bound very 0.:j8(mv kifk) xyvv8l* ufyltightly to the nuclei are referreylf8vm .*k8uivyl(k : )vj0fxd to as

  Materials in which the elz2/bhgvwsfbu7 +r.d* o0swf9ly8p qx3y-jc8 ectrons are bound very loosely to the nuclei and can move about freely within the material are referred to asdxlj9yu3szvb8s-h.7f o*cg b2 /wpqwr0 y 8 +f

  A negatively charged rod is brought near one end of an uncharged metalxu rqkc/xp2,ddj9w6.vb+3 g4x t(ltd bar. The end of the metal bar farthest from the charge tb+vlr.63 (g4jx/c, 9 duqdxpxktw2dd rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are plewpmtu1w5:54li- d gqaced near each other on an insulated table. Sphere B is briefly touched with -dgwwul4ptmq 5e1i:5 a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positil(rm 4 1*cjd2ybvy a9cvely?

  An originally neutral j g/x /xg*rw,h ows7b6electroscope is briefly touched with a positively charged glaswhxg7/ ,o6g bs */wrxjs rod. The electroscope

  An originally neutral electroscop6 :inqi o:1uure is grounded briefly while a positively charged glass rod is held near itii q:r u1on:u6. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscwofr:7lzhm -/1upk+ k ope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to the leaveszrw 1u o:lf /-p7mkkh+?

  A large negatively charged object is placed on an insulated table. A ne1 0r70l gbx-svhux7wx jy7k(tutral metallic ball rolls straight toward the ob jrsw0v7g-0xyh(x bx7 17utkl ject, 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 negative object. What is the final charge on each ball?

  Charge is

  What are the units of thee ef+q5vxz t1 hkfcm62-(juh2 Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charb hiw1- axz7fgz 2l(x,ge is larger in magnitude than the s-lz(gi h2fxz7 b,xwa1 econd charge.

  Sphere A carries a net charge and sphe6l pbxay 99jsj,po:.vre B is neutral. They are placed near each other on an insulated table. Which statement :6sppa9vjxjy .,9 lob best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If kc0 g u4bin2izb7 1/v7)g gkcdthe charges on both objects are dou/d) b7cig bz0g k 7uign2kcv14bled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutuald+uvdy+(rh ,zi /pdm 3 attractive forces of F on eachr+u(d+zh m3d/ y,ivpd other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract eec r*1n7bf)jg ach 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 centenec*1b 7) grfjrs is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated h3g. v7ahs 1u3dkpho;by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a sec v3ukh;ah3 7 1sh.pogdond electron is placed next to the first electron?

  An electron and a protonq8jhsgd+8 khu cb*6-r are separated by a distance of 1.0 m. What happens to the magnitude o+-kh u d*ghrjcs68 8bqf the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What hap9 i5jqn0o ,zj+dt+zv tpens to the size of the force on the proton if the eleco 9zq0,ijzntv+ j 5+dttron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square.tutr o2 ;lq/++:uerr l 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 placed at the other three corners of the square. What is the: +2ttru/rle q urlo;+ 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 eq:0 gc)a)k g;lapes-cm uilateral 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 actsc:eam)p-lg ;c 0 a)gks on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not a vector?z9fdlo8/ xmt:a45ksps azb )6

  At twice the distance from a point charge, th.1y b,l:zbfhabi0 k j,.+km 1b g9shize strength of the electric field

  Is it possible to have a zero electric fielodv1k*.t(7shto da- n d value between a negative and positive chark .(tstno d -a*vho1d7ge along the line joining the two charges?

  Is it possible to ha arac3kdfa; n ::dgz; 2ey/cf0ve a zero electric field value between two positive charges along the line joiningrna:e2:/df; cad3;c y kaf0zg the two charges?

  Electric field lines near psitive point chargesqcfwd,2 j *.vp

  The electric field shoc w0-ku sewa pj4l2m5.wn

  Can electric field lines intersect in free spacesv8oon;8/ (wvi zfkicw )m5f (?

  A solid block of metal in electrostatic equilix i5cx)vl,y) b-uvr8cbrium is placed in a uniform electric field.v,b c5ruvxi-c)l) xy8 Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollghtrwe2a6zj -m ikl2ga2 ep5b5) d23 zow metal sphere of equal diameters are each given the same charge, the electric field (E) mij22-)b6a zza5eekmg5ihl2 w3r 2tpdgdway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a unifooqe cgmk.,. j(cy:wq;rm electric field is directed straight upward. What can be said concerning thegj:. .yw(oq;ec cm, kq charge on the block's top surface?

  If a conductor is in electrostatic equilibrium n3fc. 72skgv)*:-dt7p ci uhz3 hefi pg/)cfthear an electric charge

  A positive point charge is enclosed in a hollow tiej0 nmt *uqb c/3ano(.d ,9- yjjw8bmetallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field aq . tnb0y-a39oemwnj*b u dtj(i,8 jc/t a point directly above the hollow sphere has

State three properties of conductm04pl,bq k;vo2mo- fwors in static equilibrium.

State Gauss's law.

  The charge carried b2f, +fqgbpqs e7k.gz)y 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 a net chahf b1t 9)eqeg*rge of +2.00 mC. How many more protons than electrons does this piece of plasti1fht geqb)9e* c have?

  What is the charge on mt 4dfsbd4zo,fckljz2ql* *4u:+ sy ,1 kg of protons?

  An atomic nucleus has a charge oqkq1vv hx5 1rma k1:-gf $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separ3d3(m6kfnq .dhee2 bn nj )p(vated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between3h23b dn 6nm.qn pd(vf)(ejek them?

  A 1.0-C charge is 15 m from a second r q+09c(sz,t nwdn3 vqnqx-j7charge, and the force between them is 1.0 N. What is the magnitude of the secon3rnjt+0qc-z97dqw(qnn ,x vsd charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apr b s6fq:--hxvknh .s0art are they?

  The force between a xpb r zel 4lrc+a272u0$30 \; mC$ 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 th/j jg y0bqjv :0bh:of7ey are moved to a new separation of 8.0 cm, what is the electric force between t7b 0jfj ybgo q/:jv:h0hem?

  Three identical point charges of 2.0 mC are placed on the x w0 ahsi:9 qj5(te :hmf3tnri8-axis. The first charge is at the origin, the second to the right at x = 50 cm, and the third isiisqfr(wmn9t:35t hh 0eja :8 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 me:6x 30v) clij*mxqomC 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 thex:vom x0qle6* mic)j 3 electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 5blhfp*n9 m291m 6gygd9*sic+ewfmj mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What i+g mwi9f mcnybe phs2*5gfdjm991 6l*s 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 d,a dwqy r/8s1o9e++hiaydpy1 do4 f1u6q( cta second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic for8/1o(y +ydadsa9 i q p6f1d,oeh1rwydt +4cquce 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 (0, 0.10 m); Q3 = 5.0 nu4z8otn.u qi1a mk5g3b9js y1C is at (0, 0). What is the magnituuasobugz ymin 411q9t 5j. 3k8de of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 ;x4id-dn,gb cm, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Wh; -bicd, 4gndxat 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 of an ftm4 b;p8, mjbequilateral triangle which measures 30 cm mbfpt;8m,j b4 on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point chargeowivof 0-6h3i s 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 ch3 i -vwifh0o6oarge of -Q such that 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 ai:eauuh* g8rb35m 5x pt x = 4.0 m. Where on the x-axis can a third charge be placed so the n8p5:aib x5*umure g3het force on it is zero?

  Charge +2q is placed at the origin and charge -q is pl nkl*yqtp6o :3aced at x = 2a. Where can a third positive c3to pn6 *l:qykharge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A t ,g1hrfh)b4+ujk7 nncotal 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 forbdde0x c658 12er rox b-ssrw5ce of gravity by the attraction of a fixed proton some distance above it. How r bb dorx5 ce521s-0sdw6x re8far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by n(. w flw2jvhh+hsp3 9fonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion foh3sf2(vp. lj h+ 9whwfrces 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 ma/ k uqjl8:g8swljhpyl7z+9c )gnitude of the electric field g/j7s j 88+ylqkwlhuc)z :pl 9at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the eltm c4 x28 .pdr)ivwrp;ectric field at a distance of 1.50 2 twr d)m.xpp4vrci8 ;m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from -u6h..wewqxzf ) /wnt a small test charge. What is the magnitude of the electric field at the location of thqftue .)w zw/-w6 h.nxe test charge?

  A 5.0-C charge is 10 m from a sm:o .s-ijk b m.ew2rln3all test charge. What is the direction of the electric fiel-e nlmi sw ..:k2jro3bd?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the f34ur1mv qf,+eufu x4force experienced by a 1.0 nC chaq1u,3vu4+mfff xre 4urge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C 9ycrrp(qsrk/i;6 tc* and are separated by a distance of 4.0 m. What is the electric field at a point midway betw;t yp(69cqiskcrr/r* een the two charges?

  A 5.0-mC charge is placed at th .jy( j kc6.m6ym2pdvhe 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. Whatv.cj mm6. 2hk6d(y yjp 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 auep- veu.+i:dr1;orend a -4.0 mC charge isdive-pe; oruer+ :u1. placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are plas 5,//zmrmkff ced at x = 0 and x = 0.20 m. What is the magnitude of the electric /z5ms/ ,fkfmrfield at the point midway between them?

  Three 3.0 mC charges are at the three corners of affg*ucjscg/i0wi1)+:ir2 s a square of side 0.50 m. The last corner is occ ja+i w0)sr 1/uf:2* cgsficigupied by a -3.0 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 placed at the corners ovm v3 4iz/*5wkvrgj4zz xb6 v i/)zw/ff thevjm3zg )x4/w5v6z /bi4f/vrivz k wz * 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, 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 uhrw2*nc- kq/wys y-rq;s()t mniform electric field. What is the magq ;t*- whs/n2myqrkcry-(s)wnitude of this electric field?

  A particle with a charge of 4.0 mC hak4,l6 :uheq kds 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 iw+l oxqdkhfa7 o/5 t9r ((rhs-s placed in an electric field of 6000 N/C pointing downward. What charge must b+x-((oha dro/ q5l tw97rhfske placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge zph, ,q ot8vzbq/(.zl6ndm e 1of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force dql(qzho,zn 6 pvme/1t. z,b8of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carr56 anhg uc99jqq(ou9 bies a charge of +2.0 mC. What is the magnitude of the electric fiel9qhog 99 (nabcjq6uu5 d 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge ofucev:1t79 zd b 3.0 mC. What is the electric field 7:b9uz tvd1ec6.0 cm from the center of the sphere?