State the law of cons pn4((rer;ug6r/ wgui ervation of electric charge.

  Is it possible for two negative char axg9nzs3 8xe( 5faee*ges to attract each other?

  Is it possible for a positive and a negative charge to attract eacyxjiehf 66y7 (h other?

  A glass rod is rubbed with a p j*i ndgpw k :y. /,q//uth64-mdlkctxiece of silk. During the process the glass rod acquires a positlthmn /. ,pwk-j/ i6d t4*k/dug:qcx yive charge and the silk

  A proton carries a

  The model of the atom shows )1e mi q- am6tj+qrda4a

  A neutral atom always h 0y n41cwn*d7nptm)xkd+zz ( qas

  An atom has more electrons thasjs7axjg+ 39i d6c 1han protons. The atom is

  Materials in which the electrons are bound very tightly to twd 2:3a kolg;jhe nuclei are referred 3d; o l2w:jakgto as

  Materials in which the electrons are yx2 8 .j+l bpmr/bm4vw6dkau .bound very loosely to the nuclei and can move about freew6. 2.u8b+ yjapmd 4lbxmvkr/ly within the material are referred to as

  A negatively charged rod is brought b *cswz;7jsf4o:gj9kh /3hoonear one end of an uncharged metal bar. The end of the metal bar farthest from the charged rowo jzj4*g9 ob:3;/oshf s7hkcd will be charged

  Sphere A carries a net positive char(9tdu0 :0+irvp4gpwsl8u)j ylh hl/j1w 2 srgge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is (18gh0 jw9pwyd/ 0lp)jl surth4l+u :sivg2r grounded. Which statement is correct?

  How can a negatively chargelez6u m8xt)q7 daj+, v .c(nzyd rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positin vb.z/ tsgo4q07ge) xvely charged glass rod. The elecvqbg 407 sx en.gzto/)troscope

  An originally neutral electrosj:kc+ bo a/.mmyub *,m 6ec*macope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is remove ,mac6.+ba/ obuc*e*:mjmky md, the electroscope

  A positive object touches a neutral electroscope, and the leaves separanhksq0wd 9p3n6t1(x e s 4.dyvte. Then a negative object is brought near the eq(4 96sedpy 1t3wnv x0snk.dhlectroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutral me9 r6zg+abbhp 1tallic 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 sth6rbp1 b gz9a+ops. 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 the Coulomb constapub 5 fqsx47g4h ,adm5nt $k$, which appears in Coulomb's law?

  Two charged objects f6.4 bmziws7cru 9.zq+au 1l,konvd(are separated by a distance d. The first charge is larger in magnitude thanob96( vq7ldnmszk.f.c1 i + wzuu4 ,ra the second charge.

  Sphere A carries a net charge a w*m9r9 altot7pfxf( 7nd sphere B is neutral. They are placed near each other on an insulated table. Which statement *7mf9 wpxot7t(9a rlfbest describes the electrostatic force between them?

  Two charged objects attract each other with a certaineab 0/,yoezrm * wrv+h ,+.xue force. If the charges on both objects are doubled e/h ,b xr+e +mev* o.,ur0zwaywith no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual at n ts(pnlr csua-37n(d4q 1i;ttractive forces of F on each other. If the charges are separated by a distance of d/3tdnq7tr -a cu;(l ns 31s(nip4, what are the new mutual forces?

  Two charged objects attract each other w1fq )68rwwu6nxh g- 6k:jd oxmith a force F. What happens to the force between them if one charge is doubled, the other charge is tripld :qxjgx6f )ww8- 1uo6h 6rnkmed, 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 distance of 1.0 xbxao7b;u /ibwn3g6oyco- y 48t6 . iem. What happens to the magnitude of tobw/a4cb 8ginxb6yo; .x yeo76tu3i - he force on the proton if a second electron is placed next to the first electron?

  An electron and a proton arkpj4vsdj832 g 1ri8d e3eyms5 e separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is vjs e4 kmy813g3 dp2sridej58placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happeel;bv2wo kqk s a1 p80tb:.mu4iye,m 6ns to the8 kbkyo6e2eblqma,;pit0 .s v1w u:m4 size of the 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 centf) 4yc5wd qg.6aiiyh *er 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. Whai id4chy)qywf 5a*6g .t 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 equi 3fp ,hw;.ln uhqzp9;glateral 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 wn9pu 3.zhf,qh ;g;lp 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 nota; x8qohv /n,kh;rn ;o a vector?

  At twice the distance from a point charge, the strength of the electric f, j4uv0 5gruo8 +mwlisield

  Is it possible to have a zero electric field value between a negative and p ;kg+jj chx0f9ositive charge along the linej0fj x;khg+9c joining the two charges?

  Is it possible to have a zero electric field value be5zdzm8 i-v3abcgeijr0. )ly,tween two positive charges alo3,0 valj.e 5rz zd8y-gbmii c)ng the line joining the two charges?

  Electric field lines near psitivek,gmfzzb d, 2z/zo46 s point charges

  The electric field shqjq afs1i2pp3ecf*p6 c* 9 4scown

  Can electric field lines intersect in free smy(yy7 .qpgena cvwa.9a +:2 qpace?

  A solid block of metal in elecq 3ltf q:bq*e2jl n*d*trostatic equilibrium is placed in a uniform electric *fq*2 q: q*lt3jnd blefield. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters ar n(3:zdfhmne;i :zbm9ia4i j*e each given the same charge, the electric field (E) midway between the cd9m fm3*b;:n4 zi haenjizi:( enter and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniformg/j;* qt69 nay yoho.i electric field is directed straight upward. Wh;*a oi6tqgnho 9y /y.jat can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibriumpt0 ( ax/admd8 near an electric charge

  A positive point charby7-lkhh6+ci:/bsf fd n y, /m8a3 srmge is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow i-8b6:ds/rm /bfs cn,7y3fl ka +hy mhsphere has

State three properties of condu.4y0q23 esagn th m*otctors in static equilibrium.

State Gauss's law.

  The charge carried by ozg. tjp, 4b2yune 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 charge of +2.00 mC. How many more protons2liijp3x w0lpn7j,rh m74o 0c than electrons does this piece of plastic have?p3in7o4ijwm p20rl ,j x0l hc7

  What is the charge o pux d(p*2g7xh )gwjg7n 1 kg of protons?

  An atomic nucleus hasmwh oleq 7r c1zm-(b3;vaa,u 0 a charge 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 valuetzkh3 e mka+9krla6-6s of 2.0 and -4.0 mC, respectively. What is the magnitude of the electr-9thzakmakk 3 + 6e6lric force between them?

  A 1.0-C charge is 15 m from a s7gg /3ktpdw 5wecond charge, and the force between them is 1.0 N. What is the magnitude ok7 w gtd5/gp3wf the second charge?

  Two 1.0-C charges have a force between them of 1.0.:(sa orp suvn )n5qs* N. How far apart are they?

  The force between a ulrzg bp;j /vpd8c ,+ya,.)cx$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, . 5 bbqm35ziovexperience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force beb zvo.q53i5bm tween them?

  Three identical point charges of 2.0 mC are placed on the x-arx kprke/7o 90xis. The first charge is 9pk/07x erkroat 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 origin?

  Three point charges are placed on the x-axis. A charge of, 4(:lk+jctt9ejbf cw +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 w +,clbtc(:kf t ejj94100 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 the following /7ystr;gy.ytpositions: 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. yrys ygt .;/t7 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,s0gaa9lqdr w4o 7pnw0,+hbst*fvn 6 x(/ 2tzp 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 wgn+b 9 datl7spr*q 2a/(t,n4 h6 ov sp0f0zwxthe 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); Q32)2m s xra*on cju9/yi = 5.0 nC is at (0, 0). What is the mais 2j rx/mcy9)n2 *uaognitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m,sv-h5)s:g:mzpol lt3m /e lz) 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0:tz vzs polmg)/ehs53 )m:ll -, 0). What 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 equilateral c 7evnh(b ugsdkx4f-1 fs(/n6triangle which measures 30 cm on a side. What is the magnitud/ nf(b14evu6n-xkd c(sfh s7ge of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q 7zwfzyq8k zm- 3sa.n. and +4Q, which are separated by 3.0 m. At what poi yfwkza7.q. nsm3z8-z nt, 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 be zero?

  A +3.0-C charge is at the ori-/z0 0p(m oe jxg0teyqhr(i7mgin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net7p0otem( im/(yh0- rzgx q 0ej force on it is zero?

  Charge +2q is placed at the origin and charge -q is plbjb 5+goo tsu4(53 wh hgvh4b:aced at x = 2a. Where can a third positivg ohs(bjwhv t35+o: h 45bu4gbe charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A tot(5 8j2 kk-udlje(xhzj 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 agfl) ksu,a/gplp u+ 4;gainst the force of gravity by the attraction of a fixed proton some di)flusgppu,4; /k l+gastance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threads 0j w3outcl)g xw3rh0 x:/zybhv6r 4-uwhich are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the thre wy0 x:3uw-ouv4crz l 3/hjxhgb0)t6 rads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus hasq0otu65 rav g; a charge of +40e. What is the magnitude of the electric field at a distance of 1.0 m fro5t0 gq6raov ;um the nucleus?

  What are the magnitude and direction of thgfgu3:;/ys jgw;(7gkr 2 tsl te electric field at a distance of 1.50 m from a 50.wg; s2:( lju;t7rfg /3ysk tgg0-nC charge?

  A 5.0-C charge is 10 m from a small testir skbeiwz02ihxbpr.8 73 h-h -r lp9p+z5l5z charge. What is the magnitude of the ebzz.r+3b i ik952z-psll7h -5e h8r xphwp i0rlectric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is nn:+ tzcili1/0wj2 hjthe direction of the electriinctn i wz/l1 2:0+hjjc field?

  A 5.0-C charge is 10 m from a small q.2e lseth, gqy)1c2y92l tqo test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the lollq92sq2t) yo.ge ey2ht c,1qcation of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distancushss4 ;cxf)k6me v v reft ;l4./xx19e of 4.0 m. What is the electric field at a point midway betwe.echk m t)64ux 14vxxl;s;frsv9/f esen the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter b6qmo. rq1fek. ib- +wstick and a -4.0 mC charge is placed at the 50 cm mark. Whatiqk+ef-r m.owb1 q. b6 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 mC oc0r648b l*:3ok;nk1sg zjqgelmw h- charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zer4w6lboomjk : *h-selg;13g8n0qzc r ko?

  Two point charges of +3.0 mC and -7.0 mC are placedjf5 lx-san6bv: c*th)wx4zi jm0* f3k at x = 0 and x = 0.20 m. What is the magnitude of the electric shaw4 z-0tc nfmljkb:5*ji*v6fxx) 3field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a squat3h ,z8c) uvtiteh5y0b+t r u:re of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field , utt:hib0e v8zt5+u3cr hyt) at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the cornea jc8 3u1lo-rbcgh/v2 rs of the square as follows: +4.0 mC at (0 ol acv82hb1jcg-3r u/, 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 irf 4prxq9z )zo6, b4hvn a uniform electric field. What is the magnitude of thv4964zr r zx, )fpboqhis electric field?

  A particle with a charge of 4.0 mC has a mass ogp-bzpmbsn 50 e54+zvf $5.0 \times 10^{-3} \; kg$. 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 gyzz l*23yr7eyc l9, y6000 N/C pointing downward. What yrze7yg23 ,y ycl *z9lcharge 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 ball c013(a ghasspis placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the eca01g3sa(p shlectric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magni)u tx8 ln1jyi7etx0s8c)k i7qtude 8qse8uckn)tx0 7x tj1l)7yi iof the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. b8n2suolzn 0, hvm -nj7d3)q g What is the electric field 6.0 cm fb su g38 dnql,0-z)2joh7nv nmrom the center of the sphere?