State the law of conservation)vf, 8hn cefbbmp uz+4ej5:+r of electric charge.

  Is it possible for two negative charges to attract ea1tdhkk 9f 4cwu2g,*aych other?

  Is it possible for apn-2/p y2qs*nv9eqep positive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the procf qykq 8y,xq7k z31j ma9q3h7ux9abb;ess the glass rod acquires a positive chargm3k1j 7bha7qa ,;qfxb qy 99zk8uyxq3e and the silk

  A proton carries a

  The model of the atom src8 .mfzi0e,l hows a

  A neutral atom always6 p (wzl apdxo7z48q149t vo3s;cyem y has

  An atom has more electrons than protons. The atomjo 8yo;68-a7l oblmz gk6 mx5t is

  Materials in which the electrons are bound nppc g n15b snci6ym 6+k;g9(nvery tightly to the nuclei are referred to(gyi nnknpc6+nm1 9c;spg b56 as

  Materials in which the electrons are bowai/+n jwf) yyo-(;j ound very loosely to the nuclei and can move about freely within the material are referwj/iyoja (wn;+-)f oyred to as

  A negatively charged rod xamiey gv. :.a9l j+v l(o2b2 r,k7/zglhsk2 ois brought near one end of an uncharged metal bar. The l(zl2vkjaghxo 7gm. va, k+r92 i.s eyo2l :/bend of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are pzid nyu 2;x:;xga6 /bxlaced near each other on an insulated table. Sphere B is briefly touched with a wire that is gr iab6ux ydn;x:z2x ;/gounded. Which statement is correct?

  How can a negatively charged rod charge an electroeiv(s et t2e .di;5i1oscope positively?

  An originally neutral electroscope is briefly tom 78tynb5w- onn.ez/mt, 3nzwzj8r8wuched with a positively charged glass rod. The electrosc.t88 wy57w z,zoemrznwtb38jnnn /m-ope

  An originally neutral electroscope is grounded briefly wh1, mfla9a w4;hd7 8ahewe4ijesgi *g )ile a positively charged glass rod is held near it. After the glass rod is remi4l ;mdg s8*ag,weie aawj4f7he)h1 9 oved, the electroscope

  A positive object touches a neutral electroscope, 5x84e r9upa0y; bw8nlh jgbb*and the leaves separate. Then a negative object is brought near the electroscope, but ab ye85j r9x4l n8*;hbb0uw pgdoes not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutral mkp6r.aw : *vbletallic 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 negative object. What is the finv kb*arw:pl 6.al charge on each ball?

  Charge is

  What are the units og)drty:x1 4 faf the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated 22idbbn:v c3txct +.,ie1wpcby a distance d. The first charge is larger in magnitude than the second charge.+icncbi:3txv bc2 p1,e2t.w d

  Sphere A carries a net charge and su*c9na 20fkvcpy 8+pmphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrosta* pfkua c2ym pc9v8n+0tic force between them?

  Two charged objects attract each other with a certain force. If 7 dk.1+dsbeij,udg1p the charges on both objects are doubled with no change in separatidi,pekgj.1+ bud s7d1on, the force between them

  Two charges are separated by a distance d and exert mutual attractpate 8e)q:q+)rd q;eiive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual )q: e+e ti8p)qr;qadeforces?

  Two charged objects attract each other with z um,q9zav hs*/ nss)8a force F. What happens to the force between them if one szs q/*9)hsz8mvanu , 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 distance of 1.0 m. What happen5q6i6.v fjmt mtyl6+ rs to the magnitude ofl5+.tt6fm6rqyij mv6 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 hapi i: n( 9kpup,ohy,1yuo2ibj (pens to the magnitude of the force on the first electron if a h,p oniuiob2jpk1yu(, 9iy :( second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0vh+z.cdq zskgd0m6z ,,bm 2n0 m. What happens to the size of the force on the proton if the electrongzdhzs+,c 2 6z0,d0.mkqnbmv is moved 0.50 m closer to the proton?

  A point charge of +Q is plaxev 1nr-3.i7z kkzod4 ced at 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 acts on the positive charge at the square's center. 7z13 -d4k.krxe ovzniNow, 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 o 3o65( pypirw om+xmn.f 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 charge due to a third charge of +Q 3rp.nwio5 +xymo(mp6placed at one of the other vertices?

  Which of the following is not a vector? kr61fk3d0g+( btuvji

  At twice the distance from a point charge, tr0zs/( .ipu1 dvhz6a d 4zzcyt88vkm 9he strength of the electric field

  Is it possible to have a zero electric fiex9mbqi9maan)a r 0p6,ld value between a negative and positive charge along the line joining the two i ,9 0pmmb )aaraqx69ncharges?

  Is it possible to have a zero electric fiskjkuh,p/ 5p: eld value between two positive charges alonh5:ks,k/pj pu g the line joining the two charges?

  Electric field linesx3yrn9q y :mk4 near psitive point charges

  The electric field shyyf22 z krlgn9 nouu-e.tx. w6yx/9q+own

  Can electric field lines intersect iniwdp-g3(mjli-6 4z xu free space?

  A solid block of metaln 5qfro)x9 db7 in electrostatic equilibrium is placed in a uniform electric qf9)7bn5 odrx field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of eq9k4/yh*;n t lvp /okaaual diameters are each given the same charge, the elect9;lyohvn / *4kakta /pric field (E) midway between the center and the surface is

  A cubic block of alu) ku)lqn,vd 0tminum rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said,l)) u0qkn tvd concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric char7 +0qui9nrpyl3/xdrd ge

  A positive point charge is enclosed in a hollow metallic sphere that is groundek8*z2: ly2 aet (qdrp7 a3wwsod. As compared to the case without the hollow sphere, the electric fiesaq apww3lzdk2 * e:r(oyt728ld at a point directly above the hollow sphere has

State three properties of qe,rx cr)ie):conductors in static equilibrium.

State Gauss's law.

  The charge carried by onenuog* 9j/jj gbhm5r,;.(b)-fbrjxs8q(cktv 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 protons x z0ka z304musthan electrons does this piece of p 0k34 suxa0mzzlastic have?

  What is the charge on z(w)ry9wn);wlsef qj/bqu 4- 1 kg of protons?

  An atomic nucleus has amf4xjhkb;37i 0z ph*g 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 va;e yxe1 :5ioillues of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric forc5ieiy xlo: 1;ee between them?

  A 1.0-C charge is 15 m from a second charge, and the for b;yjp/klp1 5ll8vln z xo ,(tis+m/,kce between them is 1.0 N. What is the magnit(/ 8ni;l,bk+l v ly1xtopjkzmsp,5/lude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. Howqw.+: o)x2b u7w e9i5t wqb+ashaud( f far apart are they?

  The force between a 5x z)pbyf)+ 2jn +xsdl$30 \; mC$ 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 iywm)3 v:6u +ix2fqoythey are move y2oq yxm+3iwvfu):6 id to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC areq + excq8wanocrfq4m/:w7l3+ 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 theoaq3qr wccm:wneq +x+fl7 4/ 8 magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are pla5e6 /1vbyebr dced on 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 anye vr51e 6/dbbd direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at p ((io drk: jfr4c3)hbthe following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 =jr:ci3 4)((bd okr hfp -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, and a se9i.to:ct +nz econd point charge of -Q is placed at the upper-left corner. 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 if9 .ie ozct:+nt a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.3015o7gab3 h3f,hp5wozo d( ami m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0hfi575pgha(a 3odwo 1z,m o3 b, 0). What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC isc2 gl dh08y8ps at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net forclgpyd s288h0ce on the 5.0 nC charge?

  Three identical chargeayx9e ;duh 3x1)z;35rdr rjs ve91gxss of 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic foexv9s;z 1adr uh3jegs9;d5 yxx3r1r)rce which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separa5 zalyng*x+0 mted 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 5g+amlyx0*znforce acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is hk98 z; ntdc ayzj+qhr-m7.t8 at x = 4.0 m. Where on the x-axis can a third charge be placed hant k mz7tdc98;r h.+-q zy8jso the net force on it is zero?

  Charge +2q is placed at the origd:. niphlyy(8a 8*ipw in and charge -q is placed at x = 2a. Where can a third positive charge +q be8l8 .*hiyywpnd:ap i( placed so that the force on it is zero?

  A copper penny has a*eqprb.h7u(xi3 g(q w m. b6b*4t uxcf 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 fixk8+th .wj3dtwxdw x 8 //zfk;* ;xmjfded proton some distance above it. How far above the electron .k*md;jx8+t f wdtjx8 d3z/;fk/wwh xis the proton?

  Two 0.20-g metal spheres are hung s+v+.zx3*s cufm j.vq from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electro q..f+s+u jx3c*v mzsvstatic 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 magnitudz01axihf m3 nz2h :pd4e of the electric field at a distance hpia 23n4fd01 :h xzzmof 1.0 m from the nucleus?

  What are the magnitude and direction obz- )8z l p.spza3uu7ef the electric field at a distance of 1.50 m from a 50.0-u ep.zz8 bsl z-)p37aunC charge?

  A 5.0-C charge is 10 m from a small test chns5ds4 sapx4/arge. What is the magnitude of the electric field at the location of the test char4x5/ spas4ndsge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction oqvj*memt y-0 9olu 7vu j2s*s 32m2lklf the electric fj u3 lv y tso2lkjem2*729 *lqs0u-mmvield?

  A 5.0-C charge is 10 m from azi, ,dd9q*r 3qe-n5a pqb3ymz small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the loca,ez n, 3i9pqz5qddyr3*a-qbm tion of the test charge?

  Two point charges each have a value of 3.0 C and are separ (fl lbint.1;fated by a distance of 4.0 m. What is the electric field at a point midway between the.;1lf( intlb f two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -41jdu)u-x5v d glceg3 4.0 mC charge-gld d)v4x jcg35ue 1u is placed 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 a -43 i)*3lt gkh+ f/tiogn.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two ch) +hfot*i k33gg itn/larges is the electric field zero?

  Two point charges of +3.0 mC anv/x/ rjc.w2zq 3 -trjcd -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude crzq r/j/ctw3v2-x j.of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.7m*pyxc m,4,dm - agf9f;vlqy50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at lyq,p;c*g,x7 4mm9 fa-ydvmfthe center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at thet:u js ;a/m2a .a;aene corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1, 0); au2a;a tmna ese;j. :/-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 cha t(pkut)q;o(4yj 3 k ,b8hvkxarge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this electric field?y3tk(4h8x o; (vkpbkjua,t) q

  A particle with a charge ofy,2;kh ma5ctia/ wp:o 4.0 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 field of:l(jm d*xkc2 unuopro1gjrz(5+(y5i 6000 N/C pointing downward. What charuxm5rpg( n(kou5i yjdcj :z1(2+lro* ge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g ca qh xpzg4,y/)9o(lil u xq+ey/rries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended ag4 l ozy x/qg)pqu,e9+(hxl/iy ainst the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. y d-,fl k2rynzhjzmj2q*v. ., What is the magnitude of the electric field 5.0 cm from the sphere's surface?2 -zqv kl,jjy2nzm*y,hfd.. r

  A metal sphere of radius 2.0cm0b5) 1 bfoi+k,d5psfb )fxh cm carries a charge of 3.0 mC. What is the electric fielf mb + ok50x51f)bsfhdb )ipc,d 6.0 cm from the center of the sphere?