State the law of conservation of electrqs2ue0 tl) uawbfl))r/p+ *deic charge.

  Is it possible for two negmix / m89l:oacative charges to attract each other?

  Is it possible for a positive and a negative charge to attract e0/pvhl ,77oejwq d f2yach other?

  A glass rod is rubbed with a piece of silk. During the process the glass rodi qbxv 5d+-nu3 acquires a positiveb- +vxdqu35ni charge and the silk

  A proton carries a

  The model of the atom shows a1wg1,vn f .hss

  A neutral atom alwayqp.ng ui(a+b0 db 0xn-s has

  An atom has more electrons than protonhxy ,0)ep2k s ix3pqq tp,ns5 69hd(bds. The atom is

  Materials in which the electrons are bo8w o c,qcjn9z4-/bomnund very tightly to the nuclei are referrjqzo9 8mnbnoc c/ 4,w-ed to as

  Materials in which the electrons are bound very loosely to the nuclei ank z cal0elv;m+))t/ pqd can move about freely witq/+cz)vl)a ; elk0p mthin the material are referred to as

  A negatively charged rod is brought near one end of an unchargedd(vj jkfgw1ha n2w0g:p -o *x; metal bar. The e od;pj (:fkjvhgn 2*xwag1w0-nd of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Tcxw(0 52zrsv they are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is5( xs2c rwztv0 grounded. Which statement is correct?

  How can a negatively charged rod co8axraz k-(fz9/; xr wharge an electroscope positively?

  An originally neutral electroscope is briefl.5cx0laxm6 st y touched with a positively charged 6lx5amx.t 0 scglass rod. The electroscope

  An originally neutral eb-spk -uq/zo.)p.mh electroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electroscop/qszk.-pe-ub)mh . o pe

  A positive object touchef/cuoc1d (jsc;k 4dn3s a neutral electroscope, and the leaves separate. Then a f/cn1d ucockj( s4;3dnegative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charg hlwq2-nq7(j jg3zjc 4ed object 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 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 n7jlq4 hwjjzqc2 g(3- negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulotur lbr0/k +xt45kbm ;mb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The fid)mt/hll 2y*ojgm h jd+0ln0 a(.l* slrst charge is larger in magnitude than the s s*o * l d2lm/y+htn lhj0(j)llm.0dagecond charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed nudk:g 85igi( /eytnb.ear each other on an insulated table. Whi . utib (n:deikyg8g/5ch statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain , dyzu 18b1z2e:nfqjoforce. If the charges on both objects are doubled with nobj11 yzof ,e8d2: nzqu change in separation, the force between them

  Two charges are separated by a distance d 4 un; yi8(yjfoand exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are tofu( y4y8nij;he new mutual forces?

  Two charged objects attract each other with a force F. What happykn2 qb,k8.bz ens to the force between them if .8k qkbnyb,z2 one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a disthbxb c0a-g:* al1-n sq.ae/5iah j)/cv6r vc jance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placeda*1s vnajhacc/ l0a6 )h5-/bcr.b:x i- vejg q next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. kt th1-8fxu7qe+z q(g What happens to the magnitude of the force on the first electron if a second el 8-t(ezuq1f+t7gkhxq ectron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m.k+1 r pg;c0mv;gg9c yw What happens to the size of the force on the proton if the electrowc;g +py 1cvk9mrgg0;n is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the cen3 x06ws ;lzjgdter 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 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 tj ls ;d0zxwg36he square?

  A point charge of +Q is placed at the centroid of an equilateral tnc +1. *fkh*ufa3k b4igun6v uriangle. 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 charge due c.+ab* 1i6u fhnuk*3 fk4vgun to a third charge of +Q placed at one of the other vertices?

  Which of the followiglbe)jj4:qpk 6qh3 ,zmn v5rch3i;2lng is not a vector?

  At twice the distance fromqc*oseq : gv *ql wn2yo3i ,ppc74s:r1 a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative and posi;gglim ,,47atbo5amh) r a0ii tive ah50i)ra, mt m4bgaolg7ii,;charge along the line joining the two charges?

  Is it possible to have a zero electricy kt3q256eflc field value between two positive charges along the line joining the tw 5lfeykcq632to charges?

  Electric field lines near ps//nr0 iux+9iuie a q8yitive point charges

  The electric field show8)vb 6as5,eq)koq pql h86inw n

  Can electric field li 0j:yscm3njk -nes intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a unm0 p (ro2( id fz ku:/4t4whrj*er.ugwiform electric field. Give a skirpgo(44 h w:zet 2jr0r*wu mfd/(.u tatement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameter9pxpcql,( vpkor 6r54 s 0m(a9hn,weas are each given the same charge, the electricnax59,94qpc,rv olem 0asrhpp k6w (( field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region wher2b e lui2 i(y.i.x-jz r vq)ilm8*0tnse a uniform electric field is directed straight upward. What can be said conl8 )tyiis ml 0q. uxn.*-bie 2vzrij2(cerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric chargew7ikm m,fkhy k)s; i54

  A positive point charge is enrdowxd03+ t)to9 yhq3-vclr, closed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the ex,hryr 9d 0+3-wqvo tco3t)ldlectric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibos*0 :nibh uk,rium.

State Gauss's law.

  The charge carried by one electron ih0in xj;oj1d(saxw-ty s+;9co b:+ nus $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net charge of + rzcc) x60 oxkrkit13(2.00 mC. How many more protons than electrons does this piec(x0k)1 x3o6zrkti rcce of plastic have?

  What is the charge on 1 iru1+v a.b*tit9e cs 5kg of protons?

  An atomic nucleus has a charge of/zp i,z*jfm:p 9jve/9 n2dulf $+40e$. 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 val rk1-/3kognuq ues of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric k o1/gn- krq3uforce between them?

  A 1.0-C charge is 15 m from a second charge, anvw xp jj -c,9ooo/i.u j:q61i9d5a pnd3y9ley d the force between them is 1.0 N. What is the magnitude of the second chari.3p9 oj o9w o n61/y-jyu9cq :ad ilxv,djp5ege?

  Two 1.0-C charges have a force between t06m h +war(0 kiztkizf1 n/rm8x.e(athem of 1.0 N. How far apart are they?

  The force between a 7m6qzlh- 1i 2 yaksnjgv x+k.ecz6:js ig7,w2$30 \; mC$ 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 fore 157qj8t s c4wmthun7ce. If they are moved to a new separation of 8.0 cmc4n tuq hs7j t5me87w1, what is the electric force between them?

  Three identical poinynkl/9fu knj2 t2s-i1t charges of 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 the magnitude and direction of the electrostatic force which acts on the charge at the origky / n -sn2l9kj2i1ftuin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is placed pxaf r7 i,( *md(zars3f h2i yi:u/lx7at 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 magniaa,i*/xrf i7pzl(ifsu: d2h yxm( 37rtude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located a432 gpbwp: cl,)yq fxa yk.c:jt 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. Whk: w43pfpqb .,g )ayj:cl cy2xat 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 a sec emdqe6 9q gtr/s7i73rond point charge of -Q is placed at the upper-left corner. It is observed that an electrostaticedsgr/qi 6t7 qr7e9 m3 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 =-:i3 vv 4n0yx(fj zp1lyzk9yb -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude ofv p( ivl1zx- zy:j 94b30nyyfk 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, 0.10 m); Q3 = 5.0 nC i+qc 8wel8 z) )v6dnnsus at (0, 0). What is the direction of the 8e 6vld unz)q+ ncs8w)net force on the 5.0 nC charge?

  Three identical charges of 3.ip iae2npo (*zjk/)v00 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of theje *2v)i (pap0nzok/ i charges?

  Consider point charges of +Q au- sj02e9kf pvnd +4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place 0- 92psfkvje ua charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and*t.p+sl1 pr6z/t*oaye)bunjoje;2 n a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is ze+jan upnp1j* e bz;)eso*.o2r 6 ltty/ro?

  Charge +2q is placed at the origin and chargemduknys9t*r( vh )s57 -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zero? 9s7v*ndtur(5)shmyk

  A copper penny has a4fmc+o)wqdwz, a 8vzj: fx /x9 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 thee+5+ gfy*kn rigt5gowas 7x3y*6f 8.i sy:ede force of gravity by the attraction of a fixed proton some distan t*kii +7+8rsw yxa ygg56:seg*edo3.5fnfey ce above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting thr:,vr5cdjc6sez3kk y0d i l8+beads which are 30 cm long. Bo0 ckz3+e ibd:y8jrdk6ls5vc,th 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 8ptz-zlh6- hxof the electric field at a distance of 1.0 m from t zh-xhzp 68l-the nucleus?

  What are the magnitude and vsz .5ald.4p ral 9btq4kk +a0direction of the electric field at a distance of 1.50 m fr4b 0tklla.az a9sd+v5q.pkr 4om a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magu,wk+y.w69pyx fc s2o nitude of the electric field at the,cxswp k26.f uow+ 9yy location of the test charge?

  A 5.0-C charge is 10 m from a small test cha-9b 7zh r6qlbg0hjof .rge. What is the direction of the egf0- hqzr.oj6bhbl97 lectric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the f q /4*hhp y+0j9ki.v gscntm+9du,n fgorce experienced by a 1.0 nC chj94k ,ifq*.0n pdggt cmshu/ n+hy9v+ arge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distanceh7j1+ 3da*nyfgipgw ; of 4.0 m. nwp7 dh;y1+ iga g3*fj What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is pli*i9dk hln0u(aced at the 0 cm mark of a meter stick and a -4.0 mC charge is plack9 n(ihi dl*0ued 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 sdj p +b0(2t:jlx,h wfa -4.0 mC charge is placed at the 50 cm mark. At what pos t2hxp( 0j,f jb+l:wdint 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 = 0 and b59x3 lpbt7iogl z-b0 x = 0.20 m. What is the magnitude of the electric field at thep3 tgz-xi97o0 bl l5bb point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. The+39zm(ymyt a c last corner is occupied by a -3.0 mC charge. Find the ey c 3(ymt+z9malectric field at the center of the square.

  Consider a square which is 1.0 m on a side. Cmo5vjsf 9f327a 5befam)pe zm1 +2nwh harges are placed 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, 1). What is the magnitude of the electric field at the square'53e1 mapo vhf2)z+ban2eswj7m fm9f5 s center?

  A force of 10 N acts on a charge of2f h2 rz)ss s12;tm4zn6 vccjw 5.0 mC when it is placed in a uniform electric field. Whatz)csvszh2 6m;jwc rs2 1tn2 f4 is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass gtwt u.n8ib7+::k mjf 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 field4f8iww,lg7rq* xe y2 h of 6000 N/C pointing doww ,h7i4yq*el 2xfr8g wnward. 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 -2l hnb)pt2wgpqxy +e10(a+1kuye 3gp/ .00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and dire/t(q1+wgeyge1 a0 yun)lbk3pp 2+pxh ction of the electric field?

  A metal sphere of radius 10 cm carries a charge,/wz uo y /pdz)fmvl2v2i)uw, of +2.0 mC. What is the magnitude of the electric fi/v)vizul),,u m2/wzpd yf2w oeld 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carri *hbt, p*dtg 0m6 6-wh2*:eyonm kbvwpes a charge of 3.0 mC. What is the electric field 6.0 cm from the center of the s**p6,bo * 2hev6dk-w mgtyhmntb:0wpphere?