State the law of conservation of ez (orqm68 sud;lectric charge.

  Is it possible for two negative charges to attract each othibws1p: ss6 d-er?

  Is it possible for a positive and a nega2:ztttj3 nq kp;5 fj9dtive charge to attract each other?

  A glass rod is rubbed wit q nns/2z ww/thj93gsx5,oloz1-g ky3h a piece of silk. During the process the glass rod acquires a positivexnzojzns y- 3g/s h lq ok9gw1w,5t3/2 charge and the silk

  A proton carries a

  The model of the atom shows a zn ,j8 *ga)y1388mwkqtrgxwr. sus l9

  A neutral atom alwayf-ff,qlymu o,;) 5c n5* qw)vvgarxk3s has

  An atom has more electrons tw dzm)201ior, a)lwn(gnqq 3jq6 d)lohan protons. The atom is

  Materials in which the electrons are bound very tightly toj+su6 ,-ggebe the nuclei are referred tu+6 e-sg,jbge o as

  Materials in which the electrons are bound very loosely to t80v.t 0ajjjurpkr+yd )vd w*3he nuclei and can move about freely within 0.aj8v3 vjr+ptd dy*wr)k0u jthe material are referred to as

  A negatively charged rod is brought near one end of an unchar.el w g sifg +8v6cbdk72+svy;gvc7 a(ged metal bar. The end of the metal bar farthest fro7agi;d wey+cf +78vvl.6s2v ggk s(cbm the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are placs93(hic:x1rlc md w)e ed near each other on an insulated table. Sphere B is briefly touched with a wire dhme9(srli1 cw cx:)3that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positw.nat-( tbx9kively?

  An originally neutral elo*vdk/ v m tb 7)e3;/yo+zoaqeectroscope is briefly touched with a positively charged glass rod./ y *qe;7eo+k adb)vz omovt3/ The electroscope

  An originally neutral electrosc3 q:4prtmkaf- ope is grounded briefly while a positively charged: a43mfktr- qp glass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neupqy: ;+v rw)gnwc6 0ndtral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens toypv )6qw;rc+ 0nw:ngd the leaves?

  A large negatively charged object is placed on an in (/ggfhczk6 js ,x/r5msulated table. A neutral metallic ball rolls straight toward/fxhs,m cz (j65r ggk/ 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 final charge on each ball?

  Charge is

  What are the units of thme )a48ms8rbw xne)od0o,.vb e Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is larger i zob s,iax.e8k9.r6u xn magnitude than the second charge8k.s b 6ix .9xaeour,z.

  Sphere A carries a net cbk7b+p ++ ulsi3 k sc27hwnt(tharge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrokbusi h7 ts2( w7 +n+p3bltk+cstatic force between them?

  Two charged objects a yz:p68x/i sb7y.lpn+ +m7mna i1d lhyttract each other with a certain force. If the charges on both objects are doubylis+h:6by n7x m d1 7.pz/l8pn +yimaled with no change in separation, the force between them

  Two charges are separated by a at3r- 8b5 cbsodistance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are tr5 bs ob3-a8cthe new mutual forces?

  Two charged objects attract each other with a force F. What happens to ks+7rhw;u0 i )kg+ivvl .pui6the force between them if one charge is doubled, the other charge is tripled, +u7 i l0s;g6ki)h.rpvw iu+kvand 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 of5v*k o6a1uhvmi w,a7g 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first ,5gu6hi*1ak vo7vwma electron?

  An electron and a proton are separated by a distance of 1.0 m. What hqs5u(sjoj 1 d-jft 2 kc9tg/(sappens to the magnitude of the force on the first electron if a second electron is placed next sdtosktf2 (qs/- cjj19ju(5gto the proton?

  An electron and a prot:fs j bzdo:2/eon are separated by a distance of 1.0 m. What happens to the sizes o:b:d jzf/2e 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 center of a square. When a second point c-q1kacb4nd/4e8 ozyu3 au-jfharge of -Q is placed at one of the square's corners, it is observed that an electrostatic force of 2.0 q-u1- a8fn / ecdayo kj443ubzN 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 the square?

  A point charge of +Q is pla yq5c+n*wuu 3nced at the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of cn5* y3nuuqw +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 placed at one of the other vertices?

  Which of the following is 5i )4nh7lrn sta8z 8hjnot a vector?

  At twice the distance from a point charge, the strength of the elec47uwtn 7p,ijypa iyt7 nnln9z:x *p(8tric field

  Is it possible to have a zero electric field value between a negative and posiss 1ngsr : w y;yz7z).d3so3aative charge along the line joining thegyws3 zs1)3ssarn:daz o 7y.; two charges?

  Is it possible to have a zero electric field value between two ps4 lwt,bee5c 4ositive charges along the line joining thc54 lb,ts4ewee two charges?

  Electric field lines near psitive point * ejuz3 r5xk*ic/1j+gf+38 fgj o tunvcharges

  The electric field shown k8y3 zwleq)n(0d,iof +3d, dcvsefo5

  Can electric field l*t6ai sy im( +v-5d:kx(zluieines intersect in free space?

  A solid block of metal in electrostaticnj hxi7 j.jx3qh5b-(c equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block -j hx5cjxh7.i3qnj(b's interior.

  If a solid metal sphere and a hollow metal sphere of equal diame -7(4i0 axrxju.dga-7 cdhckdters are each given th-rcd7 d c.k7 (g04ji-dhaxuaxe same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table i .* u srpfb;(9:qwfby4n/ffo yk2s .wxn a region where a uniform electric field is directed straig (fbkrp/yqf sx;sfwnyu42 f*9w ..:b oht upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an eleo-iwyj.x3 gwuluds/wt u. pa(b689 8hctric charge

  A positive point charge is enclosed in a hollow metaxy pawk 26 4x:bmxk 0op+5xnwyv8a ).qllic sphere that is grounded. As compared to the case withouk q04 :x mo8xyxa.abp+kw5y2p)x vnw6t the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibriumqv+e3t.dd e*trp gx 7n8 )vl3.lrmes1.

State Gauss's law.

  The charge carried by one elec97 xb-mrb-tae l(cct 0tron 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 t h7tkcho-he)fv k1 ,a2han electrons does this piece of plastic h v7kt ,ach)1o2h k-hefave?

  What is the charge on -zqh-ig2 *ruufd c k2-80 p8zxsfq6 ya1 kg of protons?

  An atomic nucleus has a charge ob9g24ol ig:gn 1-zrjlq8 v 1bcf $+40e$. 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 of 2.0 and -4.0 mC, uvp :)5l89;ymey(paehzj2bgpy ,b 2b respectively. What is the magnitu9 ,plb 25 82bgy(aebym)v zyh;puep:jde of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, andljs8bitu92vs9gr e e u5ii92 : the force between them is 1.0 N. What is the j9 eis29:8gbl9u v 2teuii5s rmagnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.p-qu sm34p oya37q vo80 N. How far apart are they?

  The force between a da)k;m b1)soo $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initl gwcr9 .t3 mlp8uv(-lially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric gcwt.38lulm 9 l p-(vrforce between them?

  Three identical point charges of 2.0czhusyp2;2 u:; i 8ovg 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 whicicu: vy 2z;o8;hsug2 ph acts on the charge at the origin?

  Three point charges are placed on the x-axis. A ch0g e gvoo; pd3l*dt52xarge of +2.0 mC is placed at the origin, -2.0 m C to the right at 0v;glte 5xg d2p*3oo dx = 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 the folg-*w,s ti +; zwkwez1 )fggd+olowing 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. What is the magnitude ofdsk gz,z;ot g-+f wie+*ww1 g) the force on the 3.00-mC charge?

  A point charge of +Q is placed at:6 qx-opcu1r yd uq+k) the center of a square, and a second point chaupxd coy ru+6: qk1)q-rge 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 if a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1ei8j*k6 -t uo),srbme.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at u-i,se)bm t 6j8 rok*e(0, 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 is at (0, 0.10 m); Q3 = 5.0 5;4x yq/ ow f1(ztmhwz6z yhi.nC is at (0, 0). What is the direction ofy wz(qmzh .xtz;64i hfy/ ow51 the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the veu;lirqst, /u/5- 9ch4wvei vii odt1 2rtices of an equilateral ti vs 5o2cttv/l, i/r ;h4u1diweui- 9qriangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separate:qyu;; 9ncbumec;6,ckj m y6 id by 3.0 m. At what point, on a line between tum; ,m;:y ubcyqi 6ec6n 9k;cjhe 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 origin and a +9.0-C charge is at x = 4.0 4 mr*pnaruo*m6+6 s;ygznxl4xa7 k3bm. Where on the x-axis can a third charge be placed so the net force snpa6o*g u74z ;6yb rx *k3lmamxr+n4 on it is zero?

  Charge +2q is placed at the origin andpz 8rhk(c009 2 rzvgpf charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zerkr c vp0pzgz(r2hf0 98o?

  A copper penny has a mass oom*juq m.h5.*p(z vyyf/spvq695hd b f 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 attracg;hmeo6 o/gg( tion of a fixed proton some distance above it. How far above the electron is the pgeh gmo/(6g; oroton?

  Two 0.20-g metal spheres are hung from a common point by noncojx fs9k) (9-kpk8vcs:is u4uanducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle bsk(p):kvjf ikau- s94cu9s8xetween the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. mk1iyj-dd164 czisqp9go56r What is the magnitude of the electric field at a disd4 6d91rs6jigmcy i 5kpz-o 1qtance of 1.0 m from the nucleus?

  What are the magnitude and dix.;a ,c6um 7puxo )y:vkjda .brection of the electric field at a distance of 1.50 )mj:ocy.ub,.; 6 pxaa7vux dk m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the may3ej9 tqfyt;l.ck r 1)6 ipp*mgnitude of the electric field at the location of the test chartlmqcj ;rikt)p3ye .6 1* y9fpge?

  A 5.0-C charge is 10 m from a small test chars obf.o 2eg2(h2k zo-cge. What is the direction of the electric of.gs eoc z -2hb22(kofield?

  A 5.0-C charge is 10 m from a small test charge. What is the magnituddafhx-zxo8: /e of the force experienced by a 1.0 nC charge plz/:8 fa d-oxhxaced at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated byh frd6wq45l7y*hcu ,cau3a v4 a distance of 4.0 m. What is the electric field at a point midway between the two chargesqhuhd auv*r,fw76c 4c l4a35 y?

  A 5.0-mC charge is placed at the 0 cm mark of a meter eq;g /m.a3ngt8a8q5ms9lmg m stick and a -4.0 mC charge is placed at the 5 .l9 amsg8m3mt;emqn qag8 g/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 -4.0 mC l hooph1: +zo2jb25iicharge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field ze5b hjo1ozl: 2op2 hii+ro?

  Two point charges of +3.0 mC and -7.0 mC are plenaf c3oiqt4g :12,nu aced at x = 0 and x = 0.20 m. Whcqife o2,1t 4an3 n:guat is the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at txz0sja- 8 kn4the three corners of a square of side 0.50 m. The last corner i k4x8sz0t-jnas occupied 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:0bhsp 5b cg(ivpj 5,p the corners of the square as follows: +pp,50jch5pvbb: (s ig4.0 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 unifonrl (ci k lnva,r2,*zzf fht :, 2o+hli78.swwrm electric field. What is the magnitude of this elz i+h.:cl7 a28(fzk v,of, n wrllt, wh*s2irnectric field?

  A particle with a charge of l0qe t7kct* 6;w .zisw4.0 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,ip wz /u+l7lbx 5h-cc g is placed in an electric field of 6000 N/C pointing downward. What i+7 zhluwlc/x 5 -,pbccharge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carrie wo e/86vup3dv3favk 7s a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric8u373vf vw/oka6evd p field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magngye3c+nk x ;y8 gwkn/:itude of the electry8y ck 3:/ngkx; wgne+ic field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the electrdb8rd d44uyc7 cm,j3)z xiaw)ic field 6.0 cm from the center of the spherw)3b)c4 rdzdca4i,jd m8x7 uye?