State the law of conservation of eledfq0tyg. o7+1ft ux y1ctric charge.

  Is it possible for two negative charges to attrg(qcy4j.v l z0act each other?

  Is it possible for a er:hjmt0wpbg/ *2gx lo62;tr positive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the d ,a(;x atkcq10px yobh3ik /5glass rod acquires a posia(xkb3 10 akcdx/q ip 5,yo;httive charge and the silk

  A proton carries a

  The model of the atom sh dm2hqgt:d4v8 x8w;idows a

  A neutral atom always hx*ksj x/v 7ply0xm94)) klm*un p br8ias

  An atom has more electrons than p+*6ceyqd jld ) hy,i9rrotons. The atom is

  Materials in which the electrons are bound very tightly to th l6c+uclhq283rn4 awt e nuclei are referreuq +82cl c ht3ar6l4wnd to as

  Materials in which the electrons aro)ep h bb-+(9.e ssstje bound very loosely to the nuclei and can move about freely ws) oh-st.esb eb+(9pj ithin the material are referred to as

  A negatively charged rod is b ujkgrqw f+ wc19;/63p s;hd8zb0b bqwrought near one end of an uncharged metal bar. The end of the metal bar farthest from the cdpcr1;s ;k+3zb86q f0qj9ubwwbw/ h gharged rod will be charged

  Sphere A carries a net positive charge,rsu rlrzmh15p)ng1(udl bz(p8m6 g2ok8+cz: and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched wi)6bplr l+d:mr2r sch nkm gz1og8u 8(z1z(p5uth a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an elyy oqhm5* y1+cectroscope positively?

  An originally neutral electroscope is briefly touched with a positively chargeq y+i4b(y2upqd glass rod. They2iquyb(4+ qp electroscope

  An originally neutral electroscope is grounded briefly while xg*2j7nhpq5 e a positively charged glass rod is7x*enp g jqh52 held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the ogu+im(15 upt )nc,xgleaves separate. Then a negative object is brought near the electroscope, but does not touch it. What hau)gcx1ng5+,(iupmt o ppens to the leaves?

  A large negatively charged object is placed on anmsjo b88onfj ;/ub7 mk;e0c y- 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 negative object. What is the final charge ojjy7o- bub8f8 e ;/ sn;mmk0con each ball?

  Charge is

  What are the units of the Coulomb constalpoaebf 9 /hw /q zfw*4gt4w/1nt $k$, which appears in Coulomb's law?

  Two charged objects are:r*qha2.jl bc+g/tp f separated by a distance d. The first charge is larger in magnitude than hja2*/lq:+ rfbt g p.cthe second charge.

  Sphere A carries a net charge and sphere B is neutraltvd- 9hoc l/l6. They are placed near each other on an insulated table. Which statemen-lvch/9d6otl t best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. Ifhv t+d*d7 09ko2t:+iotkaqti the charges on both objects are doubled with no change in separation, the force between vk2 *iadt9t: qto7d0tio +h+k them

  Two charges are separated 0wki0bq.nxi g 6 c1.bxs*y sd*by a distance d and exert mutual attractive forces of F on each other. If the charges are sepw k6 .q.xsdxgi*b ic ns10*y0barated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to t0+3jk*y f awceyxt1dp6l7 a 6fhe force between them if one charge is doubled, the other charge is tripled, and the separation distance between their3 1yef+cx6f*p7 j y0 t6awdkal 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. Whhstm83lr 47 h-t up6sqat happens to the magnitude of the force on the proton if 8hslh qt3su4 -m t7p6ra second electron is placed next to the first electron?

  An electron and a proton are separated by a distancel3 )f:xpu4-lx oicb8p of 1.0 m. What happens to the magnitude of the uc3 x 8o:ifb)p lxl4-pforce on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separau+s 2qnxb6bvo9. o js8ey( g3hted by a distance of 1.0 m. What happens to the size of the force on the proton if tb+2ne3x6s98bjs. go hov( y uqhe electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the kh,ysw. e ,v-acenter 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 fosv e ,yha,-.wkrce 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 the square?

  A point charge of +Q is placed at the centroid of an equilateral tria/f e;t+bg lka4,xa+q tngle. When a second charge of +Q is placed at one of the triangle's verticestkxl/ gq, a e4+t+;abf, 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 placed at one of the other vertices?

  Which of the following is not a vector1zms1l+ v4h6d v qp.ufb4 .uww?

  At twice the distance from a point charge, the strio:uoi. ps( u/ength of the electric field

  Is it possible to have a zero electric field value beta)w7*pnk e0frkl5l2 gj. npd;ween a negative and positive )d;57jlgrn a kk*pfwe0l2p n.charge along the line joining the two charges?

  Is it possible to have a zero electric field value between two positive chargew ys,4sr u d:avr5q73qs r:ys q4aqv 57ur,s 3wdalong the line joining the two charges?

  Electric field lineshuoj( j5r5bjg 1/+gpt,uri 6h near psitive point charges

  The electric field shown*x-jc ryid;u;

  Can electric field lines intersect in free spacvddw4 x( l;m4bu/ gd ehi gf;h,eu80m8e?

  A solid block of metal in electrostatic equilibrium is placed in a unid7+lggg- - p7a :qblmeform electric field. Give a statement concerning tha-me d7l +pg- :gl7qgbe electric field in the block's interior.

  If a solid metal sphere and a hollowhd95 +;sw3/dnoj gtpr metal sphere of equal diameters are each given j ns/9;ot hr3pw+d gd5the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a unic 25i *j zba/,o p9ym;ze.anbjform electric field is directed straight upward. What can be said concerning the charge onn e,pzj9.5zamb;c2/* y ajibo the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric chal 3dr71kxklv ew/ gv1,rge

  A positive point charge is 8zd f7gj5 qmk:pl.t;0 9zj xkgenclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sph;jpktm:q750zxfg 98 kjdz.g lere, the electric field at a point directly above the hollow sphere has

State three properties of c.s/j 0( g-duvl ndmnp-jv(,hconductors in static equilibrium.

State Gauss's law.

  The charge carried by rm,)wbwatw:,x qo 5 g*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 charge of +2.00 mC. Ho (ds jleq(g7g*w many more protons than electroneg q l*gd7s(j(s does this piece of plastic have?

  What is the charge on 132bkkc o 4eg5f1j-x br kg of protons?

  An atomic nucleus has a charr,p6ro-4jte 9eqk e,uge 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 values of 2.0 and iur 8awa 5hw4;-4.0 mC, respectively. What is the magnituw;w5auh 8 ari4de of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0 N 11q0xykii91 of6trqa . What irx 1 kaq1 fyo96iqi0t1s the magnitude of the second charge?

  Two 1.0-C charges have a (5+tf.z rgs9vqr*c yvforce between them of 1.0 N. How far apart are they?

  The force between a n9cb: odf7 lt:.gy32cn f1jk j$30 \; mC$ 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. k rgk: 5s95b.svx)la3tzs6q9r,c wqn If they are moved to a new separation of 8.0 cm, what is the ele:k6)rkq9 l.txcw5nqsga,bz5s 39 vrsctric force between them?

  Three identical point charges of 2.0 m:pfroqzt .0lua1vh.9f xqy4 /C are placed on the x-axis. The first charge is at the origin, p049/x:ot y1. hul rqzaqf v.fthe 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 p2v 5x.8fh7i znqvyt-olaced 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, anzt2yi-fvv587 .qnhxo d +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 following positions: Q1 = 2. xwi9f;cq pkh:45jn n cf(cx;9p;h i:o00 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 of the force on the 3x;: ;oph:fc94qknwhnxip9ji ( ;5fcc .00-mC charge?

  A point charge of +Q is placed at the center of a squaraj f y r i9.w9bk)e.;/mpfv(mke, 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 the positive charge at th.kemy9;f.( w k vm/r9jipf)a be 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 iz97cn(q m1tphs at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Wha(qcmnhpt79 1 zt is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m,5em+ sl2k-pfn+q 9h gmtsi :l/ 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (ks +si+ 95tegp-l/m f2nqhl:m0, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placeggqz6 bp9o1k ofwp gb(3/q /e9d at the vertices of an equilateral triangle which measures 30 cm onfb1pgqk w g6 p(/obq399/ ezog 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 separated by 3.0e lst p3f-f-f/ m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electro ft 3pf-ls-e/fstatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C chargeymta.m1h0s /i is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is mit0/1hy am. szero?

  Charge +2q is placed at the origin and charge -q is placed at x = aqp1no* j:9cj. -qdjl 2a. Where can a third positive l-ca19.qj* jjoqd:pn charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g.z9zc*u32ke4zxygr bw;2 4l ulr1q ja1 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 r t,k49 :h )gtfd2uabpattraction of a fixed proton some dis f :)rpb492kdta,htgutance above it. How far above the electron is the proton?

  Two 0.20-g metal sph6jieh ;cndia.5y,16upns9v*bu w1 r ueres are hung from a common point by nonconducting threads which are 30 cm long. Both are given identicaleysr b9d1v5,uu ;66 hi j*u 1nn.cwpai 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. Whvf/x lzln(m92r6;qdyat is the magnitude of the electric field at a distance of 1.0 m from the l;x/29fl nydzm r6v q(nucleus?

  What are the magnitude and dirr 6a;jm0kbbpf2 rt- nx-(;tppection of the electric field at a distance of 1.50 m from a 5 kmb0bx pn-;rf2ra( t-tp;p6j0.0-nC charge?

  A 5.0-C charge is 10 m fro a 0(6iy)25wxg:.qb qhhocm tmm a small test charge. What is the magnitude of the electric field at the location :ht qc ohyamx 0.5(6) qgb2mwiof the test charge?

  A 5.0-C charge is 10 m from a small test charge.ub 9h.elaf li).fd,1p What is the direction of the electric9dl eflhuap.)1b, . if field?

  A 5.0-C charge is 10 obdqen6n/ ui bt 0n,( ,pv6px*m from a small test charge. What is the magnitude of the force experie q6,6,onbid (p0vpen* /tbu xnnced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and)au: -i0euj otxaq5w4hrzz/4 are separated by a distance of 4.0 m. What is the electric field at a point midwaajq4)0 txuiz4r e5zwu:h-/ ao y between the two charges?

  A 5.0-mC charge is placed at th/ bbwng5g1r d;3yrr *re 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 5dr*/1 gbb3rgy n5rw ;r0 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 meterwhnr+2 cl mi u va9 ch2-:4dl3m7ohw*g stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joinirw+cin:42 l d9gwal* -u3comvh72 hhmng the two charges is the electric field zero?

  Two point charges of *n 75b axq-aik+3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude q*- bnkx7aa5 iof the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of sip) 6qr u7awco(3 sl:6x ;n-hu-ppr vfgde 0.50 m. The last corner is occupi- 7 :gn6c6l;f)wupus o prqx(3-parhved 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 co,o 4kos5auuz7q,c5vs4qau:y:x7sd4fh2u s m rners 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,4f c a2h5dms54 kzyssuquo4u v 7xa: s:u7,qo 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 m5 ew) m)rdjv,in a uniform electric field. What is the magnitude of this elm)5 m erv)jwd,ectric field?

  A particle with a charge of 4.0 mC has a u6)v0blvjt.t 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 ghl2s ;5*tq h8gc9tsgyqzd/5g is placed in an electric field of 6000 N/C pointing dowd5l q;gt s *gg59z/sthq8hc2ynward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carriesvx4 ,mbe ff 5kra;56ahj;)zme a charge of -2.00 nC. The ball is placed ins 5j;xv,fh4zma6bke 5;rfea) mide a uniform electric field, and is suspended against 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. What is the magnit4f39tfj2x8ql kqi6nfkg3 h9 k ude of the electric field 5.0 cm frnkfkk328t 64q9 f jl9i3gf xqhom the sphere's surface?

  A metal sphere of radiu 2jwr/lp/3 bpts 2.0 cm carries a charge of 3.0 mC. What is the electric field 6. lppbjw2tr3// 0 cm from the center of the sphere?