State the law of cons.fk nv xieft,76a9(hm7vv( rn3t(ci rervation of electric charge.

  Is it possible for two negativvurdp/u y)1g5e charges to attract each other?

  Is it possible for a positive and a negative charge to attract each ot o3(x2 qf, i6ryddgs)mher?

  A glass rod is rubbed with a piece of silk. Durint7-9f5yblp nag jae/6g the process the glass rod acquires a positive charge andaa / 79g6jn fy5pltb-e the silk

  A proton carries a

  The model of the atomi+7 bd auvz:;ksjw*1l shows a

  A neutral atom always h r: j3cj3h8o 7,zcbfqaas

  An atom has more electrons than qr-s:y i6 ,n:kgm2e 6thhzpg. protons. The atom is

  Materials in which the ;lfw l0jt fj:w-; rz9k+ykz)ielectrons are bound very tightly to the nuclei are referred to a9 fw;z;j)f-l0j:yk+l irk t zws

  Materials in which the electrons are bound very loosely to the nuclei and can ei* yid; fx7wk08oph, mov0 ;ehx oi78fp idyk*w,e about freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged mt :vmhm f8(. lym2-ionrgm(,z 7*lo7t*sd omvetal bar. The end of the metal barhomy*vm27 .ont fgd lrt(:(l mv*m8 i-,zmos7 farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere v usvj/nk /(p4B is neutral. They are placed near ea/nvvupj4k(/s ch other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charw,6.pa)n1ji4yzujqp- bsbj11 ms en6ged rod charge an electroscope positively?

  An originally neutral electroscolz)m 9dk ywm52:e s, xepm9s90axg0ajpe is briefly touched with a positively charged glas 9kdm:wal29j p, sm0a 9z)xym5ege s0xs rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positiv9m6/v4cnghe vqrr 2 i1ely charged glass rod is held near it. After the glass rod is ri6v4/mer1rncvg q92 hemoved, the electroscope

  A positive object touches a neutral electroscope,8g l2 wgooe*c0 and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to theogol* c2w0eg 8 leaves?

  A large negatively charged object is placed on an insh ym24(dz 2f-ctbdwn.y)qzc 3ulated table. A neutral metallic ball rolls straight toward the object, but stops before it toucy)2wmdtq cy 3 2hnd4-zbz.(fches 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 the6ao69 +nwftr5gyq 1uaa9 eg6 f Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a hy;kaks y79)edistance d. The first charge is larger in magnitude 9yek );ays7kh than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They o-ub+gjxhd qv; t9a,- are placed near each other on an 9u,x+daj- vbh - go;tqinsulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each othmzfx( z)sq 32ger with a certain force. If the charges on bomxzgfzs q2 )(3th objects are doubled with no change in separation, the force between them

  Two charges are separated by a diswonlulpum6-sre rg pun( :8r13rj 1,;tance d and exert mutual attractive forces of F on each other. If the charg,r-rr(lu nup:esop6w;8m j13un1l g res are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each og6 cexgen45qc.l 7d u7ther with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced neld67c7 qe4 .c5ugxg to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance os5r a nfo1/rcsw +y0k39cids4f 1.0 m. What happens to the magnits1w f0oa 9n4kc+/3riy5 dcs rsude of 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 mik03hh uhll;ct1p; (i. What happens to the magnitude of the1 phi; 03uhl thki;c(l force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.(42zsz*gf,u/lzf u dv0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to theu(z/ zl2 4fd*v zfsg,u proton?

  A point charge of +Q i ua0/r - mnzq):rpz/hps placed at the center of a square. When a second point charge of -Q is placed at one of :mzr/ u )pqprnzh0-a/ 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 the square?

  A point charge of +Q is placed at thb 1sxs9,jp ofc w7p/h1e centroid of 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 placed at one of the other verticx,b1 c7s p1who 9s/fjpes?

  Which of the followi6j- auc1hetiu h;.ut+ ng is not a vector?

  At twice the distance from a point charge, the strength of the electr:izjo4h wj4f5pf h(( aic field

  Is it possible to have a zero electric field value between a negativefihz*) 21 izh e9*kwmp and positive charge alo**i h2)9pfwz1mz eihk ng the line joining the two charges?

  Is it possible to have a zero electric field vpd9. 1v(i3hb h5fbwhnf 41 wjiqn(g3aalue between two positive charges along the line joining the two chargj d5h3wq i 3v14f nbba (i.fg(9hn1wphes?

  Electric field lines near psitive po(byib im/:(6 fwqx9lcint charges

  The electric field skhpn)l9 yl:e7hown

  Can electric field lines intersecthk erzx0m4k2),)ph og in free space?

  A solid block of metal in electrostatic equilibrium is plb,xc tqclqb (4lna-sg ) (7dtwmyc69/aced in a uniform electric field. Give a statement conc9c , 6ay(n w/qlb7xdlt4bt-qgc)m sc( erning the electric field in the block's interior.

  If a solid metal sphere and a hollow mkn::uznr4f8;n+ a jbooac0sf g* u1e(etal sphere of equal diameters are each given the same charge, the electric field (E) midway jg b0 erskn4 uu( ffca;n oznao1:8+:*between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniao++b9 udt 4qm98.fj5vl bfbh form electric fi9hqab+tu.j ovb+ 8d fmb9lf45eld is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium ne9( uycbcrw/z8ar an electric charge

  A positive point charge is enclosed in a hollow metallm4fy dyu6c; 3 z5t:icqdr* ,,q: lemrqic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow c6*4qrq3fdym:qiec ym ; z,du5r: lt,sphere has

State three propertiesx-t;r ( g;3r )z,pjs)um oxnq8gax. uy of conductors in static equilibrium.

State Gauss's law.

  The charge carried by one t q3c1*ehqzku,d7nj , u.o+en 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 md3ou xx)*p6f chrqo c460io2 l5ycym9any more protons than electrons does this piece of plastic havd0cmyo3oh xc4x 69i5*cpu6oryf )l2 qe?

  What is the charge on 1 k:gl1 m4uem nvq;)w v,ai.zmw -g of protons?

  An atomic nucleus has a charge of; 3 k;duw7wx:oed d- 9qgjecn) $+40e$. 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 valurfh/ y 5nc:pm dg-cr/4es of 2.0 and -4.0 mC, respectively. h cfgn-ym/rdc5/p: 4rWhat is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second chargm es( 32/tlgyve, and the force between them is 1.0 N. glte3(y/sm v2 What is the magnitude of the second charge?

  Two 1.0-C charges have a force bec+yj0n+koa s ;tween them of 1.0 N. How far apart are they?

  The force between a w4y .a1f1; p2yjdn+vm)mp lzv$30 \; mC$ 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 forc3bq :7t :5el:whitvkbe. If they are mt i3l:k7e bhbq :tw:5voved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0f sv.)apbaj )b w.ud-5 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 ele)jfav p)s-b5 wb. dua.ctrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is placed at ha:nq6yrag:a cq;7 3v 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 and direction of the electrosy 7a3;ar qa:gc:h nqv6tatic force which acts on the charge at the origin?

  Three point charges are located 3sk n 2w5jetw3rca2) s 8shjk9eo)oc3ut) q.pat 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. What is the magnitude of the force on thes.tt)k 3 cuaer2 8jwojk3n2)9qseh w)op3c5s 3.00-mC charge?

  A point charge of +Q is placed at the cn+*scmw0+y5ntbc():/ zd 0jkubjpnh enter of a square, 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 the center. What is the magnitude of the force that jn 0 t(dc:zms+5n/p*u0 +yhkbb n)cjwacts 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, 0.1htg89 :c sj8s wt+qc7b ne8kf00 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0csteq 8c78t +sjnf98hg :wbk0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 =rub x1x;n-oz m9 3(y/myz+vpb 5.0 nC is at (0, 0). What is the direction of the net force on ubbzxy/3(n ymvz -r1 pox9m;+the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equil8kbh0 4k*t t1e: kstjyateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which act0hkkk 4t* yjt1:te8sb s on any one of the charges?

  Consider point charges of +Q and +4Q, which are separateq,qo+ lm+6u ztd by 3.0 m. At what point, on a line between the two char qu6,qolz+ +tmges, 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./ ok gf5w s(d9itt8)pm0 m. Where on the x-axis can a third charge be placed so the npkgf /(8 o5sdmti9) wtet force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed--gksa2x /b )oluo 5ry at x = 2a. Where can a tob- l25xg-oysark)/ uhird positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g.;/vxm-n:l 4ltkrkj + m 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 gq*v j t9q1sa)+ ma3jgup against the force of gravity by the attraction of a fixed proton somea9 tv1q+qg) *jgsj3 am distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threaq ;bv4:pdtva zq,.-p ),q;nhs ihm6 ozds which are i.p 4qvspqt vo, hh)6zd,z;qm;a-:b n30 cm long. Both 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. Wh ctbc p2lz:-u4at is the magnitude of the electric field at a distance of 1.0 m from the nucleus?z tc- 4u:bpc2l

  What are the magnitude and directio.oz6rkdxjn 1,qzh2me2s s;.fn of the electric field at a distance of 1.50 m from a 50.0-nC oz2sfs621j;,mer.x qzd h.nk charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the e9o sq*s nk8b4nlectric field an94*ns s o8qkbt the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direc2sh*s oxy 09elxh i-u;tion of the electric fiele0*ixy us29o;-xslh hd?

  A 5.0-C charge is 10 m from a small test charge. What is l 2) )efm /ekl(cjgv+bthe magnitude of the force experiencedj)k+cel emg2b/)vfl ( 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 are separated by a xp-1 7b vf(wi*eefp- pz7-h 0z8 ehofedistance of 4.0 m. What is the electric field at a point midway between the two chargezw7-p7zbpf(o fev*e xhfp e8-eih10-s?

  A 5.0-mC charge is placed at the 0 cm mark of a meter s4o(/c0 e(vejesx e *82a lgmmktick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm mark? jlse x/o480mvme( kceae*2(g

  A 5.0-mC charge is placed at vt+l-ptwo1 v hg4dp75the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mad1 +7 ptlpgv4vow-th5rk. At what point 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- dfihzha08 7*0ok bpgsn) o(v x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway betwdfka-h g s0pvz)(7b8n*o0io heen them?

  Three 3.0 mC charges are at the three corners of a square oiw5hox1 +t7tgf side 0.50 m. The last cornerho5gi1w7t+ xt is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is hehp: ; rh:zmgs 7otw*)-ox5v 1.0 m on a side. Charges 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); -sr v5ogemowhh)z x*p:t 7h-;: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,k84gfe.uv c h uniform electric f.kh ,8 4guecvfield. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC ha4bjslt7x t 1l-s 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 rq3umx 7sr( cwz6,x2eof 6000 N/C pointing downward. What charge must be placed on the w7s6,c ( uxmr2ze3 qrxball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placed iny fojv;ugcaj3) y0l7(side a unifo03g j ;7vaj)(fylcoyurm 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 co- d3z;pgz / -l2gqmybarries a charge of +2.0 mC. What is the magnitude of the electric fie/ogzl-mzg b p 2-y;3qdld 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge ofg;79 n yufvfk0 3.0 mC. What is the electric field 6.0 cm from the center of the svyk; un9fg0f7phere?